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By now, we all know the details. On Friday night, 22-year-old Elliot Rodger stabbed his two roommates and one of their friends to death; shot and killed two women at a University of California, Santa Barbara sorority house; shot and killed a U.C.S.B. student at a deli; shot and wounded five people while driving the streets of Isla Vista, Calif., in his black BMW; and hit four people with his car before putting a bullet in his head.

In many mass shootings that end in suicide, we’re left asking why. Adam Lanza destroyed his computer before committing the massacre at Sandy Hook Elementary School, and investigators were only able to retrieve some information from his hard drive. But like Seung-Hui Cho, the Virginia Tech killer, Elliot Rodger left behind a 140-page manifesto, entitled “My Twisted World,” in which he places the blame for his post-adolescent misery and subsequent rampage squarely on the shoulders of the women who rejected him over the course of his wealthy Santa Barbara upbringing. (His father is an assistant director on the “Hunger Games” films and his grandfather was one of the founders of the Magnum photo agency.) Rodger had been planning his “day of retribution” for three years.

His parents, who are divorced, received the manifesto before a local news station did, and called police and raced to his apartment to try to stop him. It was too late. They’d been concerned about their son in recent years: He was planning to drop out of Santa Barbara City College because of his inability to make friends, and, according to his father, he had Asperger syndrome. In April, his mother had called the Santa Barbara County Sheriff’s Office after seeing a number of disturbing YouTube videos her son made.

Police performed a welfare check, but after finding Rodger courteous and calm, they left. Though he had already legally purchased the two Sig Sauer P226 pistols and the Glock 34 he would use in the shooting, Sheriff Bill Brown said on Saturday that if someone has not been institutionalized, there is no legal basis for confiscating a firearm. Rodger was apparently relieved, adding a note to his manifesto: “If they had demanded to search my room that would have ended everything. For a few horrible seconds I thought it was all over.”

The victims’ families are outraged.

“It’s preposterous that a kid who’s in that bad a shape may go to three different gun stores and buy an arsenal,” Bob Weiss, the father of 19-year-old Veronika Weiss, who was killed at her sorority house, told CNN. “But it happens all the time.”

But no one unleashed as much public anguish as Richard Martinez, the father of 20-year-old Christopher Martinez, who had gone to a deli to get something to eat when he was killed. Shortly after the rampage, Martinez stepped before the news cameras and said, “Chris died because of craven, irresponsible politicians and the N.R.A. They talk about gun rights. What about Chris’s right to live? When will this insanity stop? When will enough people say, ‘Stop this madness!’ Too many have died. We should say to ourselves, ‘Not one more!'”

Also among the dead are Katherine Cooper, 22, who was killed along with Weiss at the sorority house; and Cheng Yuan Hong, 20, George Chen, 19, and Weihan Wang, 20, who were stabbed to death at Rodger’s apartment.

Here is today’s report.

—Jennifer Mascia

Friday:

A 6-year-old girl accidentally shot herself in the arm with a gun she found at the home of one of her father’s friends on the far east side of Indianapolis Friday afternoon. That morning in Indianapolis, 19-year-old Carlos Rodas was shot during a meeting to sell his iPhone that he’d arranged through Craigslist. Tremaine Robertson, 15, was killed and seven others were wounded when someone opened fire at a house party in the Gentilly neighborhood of New Orleans late Friday. Delores Jones, 25, was shot and killed at her home in eastern New Orleans Friday morning, and police arrested her ex-boyfriend, 27-year-old Jermal Holmes.

Briar Newsome, 15, was killed when a gun discharged as he and his father were placing a boat in the Broad River in Savannah, Ga., Thursday afternoon. King Reeves, 23, was shot as he walked to a relative’s house in Savannah early Friday. Kiana James, a pregnant 16-year-old girl, was killed and three people were wounded when someone opened fire from a passing car on the east side of San Antonio, Tex., Friday night. Robert Brown, 16, was killed in a targeted shooting as he walked to a bodega in Hempstead, N.Y., late Friday. A man was killed and three men were hospitalized in a shooting at a barbershop in Bellflower, Calif., Friday night.

Three men were shot during a fight in the Tower Grove south neighborhood of St. Louis, Mo., Friday afternoon. A boy was shot in the hand by his mother’s ex-boyfriend, 27-year-old Christopher Shawn Davis, who then turned the gun on himself at a home in Newton, N.C., Friday afternoon. Mary O. Martin, 82, was accidentally shot by her 84-year-old husband as he showed her an old pistol in Centreville, Md., Friday morning. An 87-year-old woman was accidentally shot in the stomach and killed in Winsted, Conn., Thursday night. John Poucher, 89, a World War II veteran, shot and killed his wife, 86-year-old Barbara Poucher, who suffered from Alzheimer’s, before killing himself in a home in Ormond Beach, Fla., early Friday.

In Scranton, Pa., early Friday, Vincent Darbenzio, a 47-year-old cab driver, was shot in the head and killed by 16-year-old Aazis Richardson, who told reporters, “That’s what I do to people that don’t listen.” Two men were killed and another man was wounded in three separate shootings in west Baltimore Friday afternoon through early Saturday. A man was shot in the leg during a home invasion in Reisterstown, Md., Friday afternoon. Two men were critically wounded in a drive-by shooting in Vineland, N.J., early Friday. An 18-year-old man was shot after he crashed his vehicle into a fence surrounding a home near Weslaco, Tex., Friday night. A man was shot and critically injured in Birmingham, Ala., late Thursday.

A 15-year-old boy was shot in the leg at a park on the east side of Columbus, Ohio, Thursday afternoon. Robert Schnetzer, 27, was shot and critically wounded near a gas station after leaving an after-hours club on the east side of Columbus early Friday. Michael Douglas, 18, was accidentally shot in the chest at a home in Columbus Friday afternoon, and a 17-year-old boy was arrested. A man was killed in a shooting in the South Linden Neighborhood of Columbus Friday night. Devin Montgomery, 21, was shot and killed during an altercation at a graduation party at the Columbus Fairgrounds in Columbus, Miss., early Friday. A 33-year-old man was shot several times and wounded behind a home in Columbia, Mo., Friday night.

John Brazel, 33, who was suspected of killing his ex-girlfriend and shooting a neighbor who came to her aid at an apartment complex in Tempe, Ariz., last Tuesday, was found dead of a self-inflicted gunshot wound after a police chase early Friday. Michael Barrow, 36, who was suspected of a double shooting and armed robbery earlier this week, shot himself in the head during a standoff with authorities in Laurel Hill, N.C., Friday. Terrell Wilson, 21, was killed when someone opened fire on his home as he slept in North Charleston, S.C., early Friday. A 23-year-old man was shot to death while breaking into an apartment in the Oak Cliff section of Dallas, Tex., Thursday night, and police believe the robbery was drug-related.

A 39-year-old man was shot and wounded in Milwaukee, Wis., late Thursday. A 21-year-old man was shot several times by someone in a passing car on the southeast side of Rockford, Ill., early Friday. A man who was “drinking and being loud” in a home in Henderson, Ky., was shot in the foot early Friday. Tyrone Huggins, 31, was shot and critically wounded after a possibly drug-related altercation in a home in Hartford, Conn., late Thursday. A man showed up to a hospital with a gunshot wound to the head in Greenwood, S.C., late Thursday. A man was shot through the hand when his neighbor discharged a gun during a dispute, sending a bullet through the wall, in Phoenix, Ariz., Friday.

A 40-year-old man was shot during an argument at Mark’s Texas Hots restaurant on the northwest side of Rochester, N.Y., early Friday. One person was shot and wounded at an apartment complex in Memphis, Tenn., early Friday, and in a separate incident 45 minutes later, two people were wounded when someone opened fire on a vehicle. Andrew Johnson, 22, was shot in the parking lot of an apartment complex in Baton Rouge, La., Thursday afternoon and died of his injuries Friday morning. A man was robbed at gunpoint at a Lafayette, La., hair salon 20 minutes after he posted a picture of himself holding cash on a social media website Friday night, and was shot in the back while trying to flee.

A 29-year-old woman was shot in the neck while holding her 15-month-old twin girls during a home invasion in Garden Grove, Calif., Friday morning. A man was found shot on a street in Buffalo, N.Y., early Friday. A man in his 20s was found shot to death at an apartment complex on the north side of Jacksonville, Fla., Friday night. A man was shot in the head and killed on the east side of Cleveland, Ohio, Thursday night. Joshua Brightwell, 20, was shot in the neck with an air gun in the parking lot of the Kern Federal Credit Union in Bakersfield, Calif., Thursday night. A homeowner was shot in the head during a home invasion in Wagener, S.C., Thursday night.

A woman was shot and wounded in a car parked in the driveway of a home on the north side of Flint, Mich., Friday night. A 48-year-old man was shot in the arm during an argument in Yakima, Wash., Thursday night. A man was shot in the leg as he got out of his car in Dayton, Ohio, Friday night. Earlier that day in Dayton, Rodolfo Miguel Cervantes, 31, was shot and killed during a confrontation with an acquaintance. A man was shot and killed while waiting for a family member outside a residence in Las Vegas Friday night.

Regina Branum was shot and killed with a .38-caliber revolver in Kennett, Mo., Thursday night, and her husband, Allan Branum, was charged with murder. A 23-year-old woman was found shot and critically injured in the front yard of a home in Battle Creek, Mich., Friday night, and police are searching for her boyfriend, 27-year-old Richard Denard Bozell. Timothy Baylor III, 19, was found shot to death in Williamston, N.C., Friday night. A 16-year-old boy was shot and wounded in north Champaign, Ill., Friday night. A 17-year-old boy was shot multiple times and wounded while committing a robbery at an apartment complex in Arlington, Tex., early Friday.

Saturday:

A man shot and killed his toddler daughter and wounded the child’s mother before shooting himself to death in south Ector County, Tex., late Saturday. Logan Cookson, 10, died after he was accidentally shot in the stomach in Cabot, Vt., Saturday afternoon. A four-year-old girl was accidentally shot in the leg by her 10-year-old cousin while they played with a rifle they found in the closet of a home in north Houston, Tex., Saturday afternoon. Five people, including a 3-year-old and an 11-year-old, were wounded when a group of men opened fire on a neighborhood on the east side of Detroit Saturday afternoon.

A 15-year-old boy was shot in the arm while sitting in a car with his family in Rockford, Ill., late Saturday. Three people — Devonte Dantzler, 21; Sandy Gaddis Barnwell, 22; and Jamie Williams, 28 — were killed and a fourth person was wounded in a shooting following a fight at an oceanfront motel in Myrtle Beach, S.C., late Saturday. In a separate incident an hour earlier, a man was shot and wounded. Early that morning in Myrtle Beach, a man was shot in the leg at the Fountainbleau Inn. Marqueze D. McGhee, 25, and Xavier M. Buckler, 23, were killed and Dalreco Franklin, 26, was wounded in a shooting at the Hop n’ Pop Food Mart in Panama City, Fla., early Saturday.

A 25-year-old woman was shot in the leg, and a man with her was assaulted, in Richmond, Va., early Saturday. A man was shot in the leg in Danville, Va., early Saturday. Mathew Pech, 27, was killed and two others were injured in a shooting during a disturbance that involved 35 people on a Cape Coral, Fla., street early Saturday. A man was cut by flying glass when someone shot into his vehicle in Huntsville, Ala., early Saturday. A man was shot in the foot during a fight outside Bernie’s Bungalow Lounge in Anchorage, Alaska, early Saturday. Two men were shot while walking to their vehicles after a graduation party in Clarksville, Tenn., early Saturday.

Erica Flores, 42, was shot and killed in the front yard of a home by someone in a passing car in Patterson, Calif., early Saturday. A 21-year-old woman and a 30-year-old man were shot and wounded at an intersection in the Fourth Ward of Paterson, N.J., Saturday afternoon. A woman was shot to death while leaving her apartment in West Ashley, S.C., Saturday morning, and police are searching for the father of her child, 38-year-old Reco Ramone Felder. A woman and her daughter were shot in their home in Lake Butler, Fla., early Saturday, and the woman’s husband, 35-year-old Lavar Mills, was arrested. A man was wounded when an altercation between people in two cars led to gunfire in Lake Worth, Fla., Saturday afternoon.

A 24-year-old man was shot outside an Ann Arbor, Md., hookah bar early Saturday. A woman was shot in the thigh outside an apartment complex in Ypsilanti, Mich., early Saturday. A 25-year-old man was shot in the head and killed in West Philadelphia early Saturday. A man was shot in the forearm at a home in east Austin, Tex., Saturday night. A man was shot in the head and grazed in the leg during a drive-by incident in Buffalo, N.Y., Saturday afternoon. A 20-year-old man was shot in the collarbone area when three masked men followed him home and demanded that he and his roommate hand over money in Bradenton, Fla., early Saturday. Also that morning in Bradenton, a man was wounded in the leg during a drive-by shooting.

Eric Mitchell, 18, was shot in the face and killed while trying to buy a motorbike in southeast Columbus, Ohio, Saturday afternoon. Two brothers, ages 22 and 26, were shot and wounded after a brief exchange of words with a man in the driveway of their Pico Rivera, Calif., home Saturday afternoon. A man was shot in the wrist near a playground in Walnut Hills, Ohio, Saturday afternoon. A man was wounded when someone opened fire in a mobile home park in Anderson, S.C., early Saturday. Two men were shot after leaving a club and walking into a bank in Nashville, Tenn., early Saturday. That afternoon in north Nashville, Michael Weaver Jr., 36, was killed in a drug-related shooting.

Two men were shot at an apartment complex in South Tucson, Ariz., Saturday night. Two men were killed in a shooting at an apartment complex in Egg Harbor Township, N.J., Saturday. Jose Guardado, 24, was shot and killed during a family gathering in Bryan, Tex., Saturday night, and his wife’s uncle, Joe Luis Becerra, 50, a convicted sex offender, was arrested. A man was seriously injured in a gang-related shooting in the New Brighton area of Staten Island, N.Y., late Saturday. Larry Jones, 41, who was paralyzed in a drug-related shooting in Minneapolis, Minn., last November, died of his injuries Saturday. A 17-year-old boy was injured in a gang-related shooting in Santa Ana, Calif., early Saturday.

A woman was kidnapped from a convenience store and shot by a man who then barricaded himself inside a home in east Dallas Saturday morning. He was eventually found dead of a gunshot wound, but police don’t know if the suspect was shot by officers or if he shot himself. Three men standing in a parking lot were wounded when someone opened fire from a passing car in St. Louis early Saturday. Trenton Wallace, 22, was shot and critically wounded at Upland Park in Omaha, Neb., early Saturday. A 42-year-old man was shot following an altercation at USA Chicken and Biscuit in Manchester, N.H., early Saturday.

Derrick Booth, Jr., 22, was found on the front porch of a home suffering from an ultimately fatal gunshot wound in Peoria, Ill., early Saturday. A woman was shot in shoulder and a man was shot in the hand during event at the American Serbian Club in Hopewell Township, Pa., early Saturday. A woman was shot and wounded by a man who then took his own life during a domestic dispute at a home in Kissimmee, Fla., Saturday morning. Sharon Rentas, 41, was shot multiple times and wounded in a Family Dollar Store in Hartford, Conn., Saturday morning, and her estranged husband, the suspected shooter, turned the gun on himself. He is in critical condition.

Jair Cabrera, a police officer for the Salt River Pima-Maricopa Indian Community, was shot and killed during a traffic stop in east Phoenix, Ariz., early Saturday. Alfred C. “Butta” Watts, 38, was shot and killed outside a bar on the South End of Bay City, Mich., early Saturday. Max Levine, 25, was shot and killed in a parking lot next to the Indianapolis Motor Speedway early Saturday. A woman was wounded when a man accidentally fired his handgun in Alderpoint, Calif., Saturday afternoon. A man in his mid-20s was shot and wounded in Lincoln City, Ore., Saturday night. A 30-year-old man was found shot in the head on a sidewalk in Cleveland Saturday afternoon.

Devonte Henri Owen Taylor, 21, was found shot to death on a sidewalk in Akron, Ohio, Saturday afternoon. A man was shot in the leg in Mount Pleasant, Wis., Saturday night. Brendon Moorer, 34, was found shot to death in his car at a gas station in Youngstown, Ohio, late Saturday, and police believe robbery may have been the motive. A 44-year-old man was shot at a motel in south Stockton, Calif., early Saturday. A man was shot in the chest in north Stockton Saturday evening. A man was killed and another man was wounded in a shooting in Long Beach, Calif., Saturday night. Ricardo Smith, 36, was shot and killed at a home in Lincolnville, S.C., Saturday night.

Three men were critically wounded in two separate shootings in Norristown, Pa., late Saturday. Tamekin Bradley was shot in the groin and Blake Lamont Green was shot in the leg during a shootout in the Northview Heights neighborhood of Pittsburgh late Saturday. Fay Ann Noel, 58, a Mississippi Department of Corrections warden, was shot in the chest with a .20 gauge shotgun and killed during an argument at a family gathering in Holmes County, Miss., late Saturday, and family members said the victim’s nephew, 25-year-old Kenneth Lee Williams, fired the shot.

Gary Darel Pone, 25, was shot and killed during an argument with his brother at a home in Parkton, N.C., Saturday evening; Kewathian Pone, 22, was arrested. Angelica Haro, 35, was shot and killed when four men came to a home in Farmersville, Calif., to confront a man who lives there Saturday night. A man was shot in the leg near the University of South Florida in Tampa, Fla., Saturday morning.

Sunday:

Four men and four women were shot when someone opened fire at crowd of partygoers in the East Flatbush section of Brooklyn, N.Y., early Sunday. Six people were shot, one fatally, in four separate shootings across New Orleans Sunday. Sheymarr R. Noble, 22, was killed and Emerson D. Ware, Terrelle D. Russell and Davon Ballard were wounded in a gang-related shooting sparked by a fight in central Toledo, Ohio, Sunday afternoon. Steven Blanc, 14, shot and killed his 16-year-old brother, Stanley Blanc, before killing himself in the Little Haiti neighborhood of Miami late Sunday. A relative said they had been involved in a fight over a shirt, and the younger brother’s friend told him to kill his brother. Two teenagers, ages 15 and 17, were shot in the street near an apartment complex in southwest Houston.

DaRae Delgado, 15, was shot four times in the stomach by someone who came to the front door of her Duquesne, Pa., residence Sunday night, and her injuries induced a miscarriage. The suspect in a home invasion shot and killed himself during a standoff with police in the Obetz area of southeast Columbus, Ohio, Sunday afternoon. Late that night in east Columbus, a man walked into a fire station with a gunshot wound. One person was shot in the hallway of an apartment building in the Avondale neighborhood of Cincinnati, Ohio, early Sunday. A woman was shot and wounded in the English Woods neighborhood of Cincinnati Sunday afternoon.

Gerard Davis, 35, was found shot in the hip during a fight after he left a nightclub in Bridgeport, Conn., early Sunday. A 16-year-old boy was grazed in the arm when a group of men opened fire on each other in Shreveport, La., Sunday night. One person was shot and killed south of downtown Topeka, Kan., early Sunday. A 22-year-old man was shot in the shoulder with a .22 in San Antonio, Tex., early Sunday. A 21-year-old man was shot after a fight in the parking lot of a banquet hall in Cascade Township, Mich., early Sunday. A 20-year old man walked into an Omaha hospital suffering from gunshot wounds to his groin, leg and foot early Sunday, but refused to tell officers how it happened.

A man was wounded in a car-to-car shooting in Lexington, Ky., Sunday afternoon. Early that morning in Lexington, a man was shot while trying to break up a fight at a gas station. Ludy Cruz, 41, was gunned down outside a nightclub in Kansas City, Mo., early Sunday. James McCracken was wounded in the leg in a drive-by shooting in Chattanooga, Tenn., early Sunday, and he refused medical attention. A man was shot in the neck by a man who pretended to be a police officer and forced his way into a home in North Fort Myers, Fla., late Sunday. A woman was accidentally shot in the arm when a man’s 22-caliber handgun fell from his waistband while he was shopping at a Walmart in Columbus, Ohio, Sunday.

A 56-year-old woman and her 20-year-old daughter were shot during a longstanding family dispute at a home in Winton, Calif., Sunday morning, and James Robert Miller, a 72-year-old man in a wheelchair, was arrested. Myron Parker, 25, was shot and killed at a gas station in south suburban Lansing, Mich., early Sunday. Adrian Jones, 27, was shot in the chest and Talena Smith, 25, was shot in the buttocks at an after-hours restaurant in Syracuse, N.Y., early Sunday. An 18-year-old man was wounded when someone in a car opened fire as he pumped gas in Orange County, Fla., Sunday night. An 18-year-old was shot in the leg in Skokie, Ill., Sunday afternoon.

One person was wounded by a self-inflicted gunshot in Davenport, Iowa, Sunday evening. A man was shot and killed at an apartment complex in Columbia, S.C., early Sunday. Terriona Searles, 17, and another teenage girl were shot and wounded after a graduation party outside the James Brown Arena in Richmond County, Ga., Sunday night. William White was shot four times during a home invasion in Dayton, Ohio, Sunday night. Two tenagers were wounded in a car-to-car shooting in Bellflower, Calif., Sunday afternoon. Three people were wounded during a shootout between bouncers and a group of unruly customers who had been kicked out of a nightclub in Hamtramck, Mich., early Sunday.

Three people were injured when someone opened fire on a crowd of 200 to 300 people attending a rodeo and church-related festival in Cassville, Ga., Sunday afternoon. A man and a woman were shot at the Wave Rider Resort in Myrtle Beach, S.C., Sunday night. A 30-year-old man was fatally shot outside his apartment in east Oakland, Calif., early Sunday. That night in east Oakland, a 38-year-old man was killed and a 30-year-old woman was wounded when someone opened fire on a group of people on a sidewalk after a party. A 32-year-old man was shot twice in the back outside his home in Huntington Station, N.Y., late Sunday. Two men were wounded when someone opened fire at a flea market in Opa-locka, Fla., Sunday night.

Sathrie Zack Robinson Jr., 28, was shot multiple times and critically injured in Edgewood, Md., early Sunday. Juan Carlos Ruiz, 27, was shot and killed in a car in Durham, N.C., Sunday afternoon. Two men were shot and wounded during a robbery near the Indianapolis Motor Speedway early Sunday, 24 hours after a man was fatally shot in the same parking lot. A 17-year-old boy was shot in the back in Hamilton Township, N.J., late Sunday. A man was killed and another man was wounded in a shooting in east Bakersfield, Calif., Sunday night. An hour later, a man was found suffering from a gunshot wound a mile from the scene, and police think the shootings may be related.

A 30-year-old man was found lying on the ground suffering from a gunshot wound to his back in a park in Springfield, Ohio, Sunday afternoon. A man was found shot in the torso in a crashed car in Waco, Tex., Sunday night. Mark Kroening, 62, was shot and killed by 41-year-old Zuriel Turk, who then killed himself, during a custody exchange in the parking lot of a Dairy Queen in Latonia, Ky., Sunday evening; Kroening was married to Turk’s ex-wife. Jaleel Tolbert, 19, was shot in the chest and neck and killed during a large fight at an annual block party in Cleveland Sunday night; two men, ages 20 and 21, are recovering from gunshot wounds.

Summer Hickman, 34, was found shot to death at her home in Mexico, Mo., Sunday, and her husband, 34-year-old Ricky Harding, Jr., with whom she reportedly had an abusive relationship, was arrested. A 36-year-old man and a 23-year-old woman were wounded when someone opened fire on their car as they drove away from the annual Stone Soul Concert in Walnut Creek, Calif., Sunday. A 17-year-old boy and a 36-year-old woman were injured by gunfire in Milwaukee Sunday night. An hour later, a 26-year-old woman was wounded when someone opened fire into a Milwaukee home, and a 36-year-old man was wounded while driving past the scene. Two hours later, three men, ages 30, 39 and 43, were shot and wounded elsewhere in Milwaukee.

David Allen Ackerson, 51, was fatally shot in the stomach following an argument with another man over a plate of food at a home in Marion Center, Pa., Sunday evening. Dale Vance Jr. was wounded when someone fired a shot into his mobile home in Lincoln County, W.Va., early Sunday. One person was shot and wounded at a home in Spartanburg, S.C., Sunday night, and the suspect, 45-year-old Ricky Lee Davis, is at large and considered armed and dangerous. Willie Patterson, 36, was shot several times in the chest during an argument with his stepfather, 68-year-old John Douglas, in their home in DeLand, Fla., late Sunday.

A man was shot and wounded near the Taste of Cincinnati culinary arts festival Sunday night. Iyanna Roulac, 16 was shot in the stomach while standing near a group of people who were fighting on a porch in Edenton, N.C., Sunday night. Two men, ages 20 and 26, were wounded when shots rang out in Neptune, N.J., Sunday night. Montavious Bell, 29, was shot and killed while defending his 16-year-old sister after she was punched in the parking lot of an apartment complex in Riverdale, Ga., Sunday. A man was shot and critically wounded in Seaside, Calif., Sunday night. A 27-year-old man was fatally shot in the leg, torso and hand after a fight broke out in the Brownsville section of Brooklyn, N.Y., Sunday morning.

Monday:

An 11-year-old boy was shot in the head in an apartment in Las Vegas early Monday, and he is in extremely critical condition. Michael Day, 13, was shot and killed after an ongoing dispute in Kalamazoo, Mich., Monday evening, and an 18-year-old was arrested. Mi’Tavius Smith, 14, who died inside a northwest Atlanta, Ga., apartment Monday afternoon, may have accidentally shot himself. Two men were shot, one fatally, on the east side of Indianapolis Monday afternoon. A Los Angeles County sheriff’s deputy was shot in the stomach with a semi-automatic during an attempted traffic stop in Long Beach, Calif., Monday morning, and the suspect was killed by police.

A man was shot and wounded following a fight in the parking lot of Rodeo Night Club in north Austin, Tex., early Monday. Oscar Torres, 16, was killed and another man was critically injured in a shooting in west Baltimore early Monday. A man was shot and killed in Riviera Beach, Fla., Monday afternoon. Jamie N. Mathews, 37, was shot and killed by her co-worker, Randy L. Grimm, 51, who then shot and killed himself outside Mathews’s home in Riverside, Ohio, Monday night. A woman was shot and wounded in Madison County, Ala., early Monday, and her husband and son were taken in for questioning.

A man was struck twice in a gang-related drive-by shooting outside an apartment complex in central Fresno, Calif., Monday afternoon. Dwayne Joseph, 17, was shot and killed in the St. Roch neighborhood of New Orleans Monday afternoon. In an unrelated shooting two hours later, 25-year-old Corey Reed was killed in the Lower Ninth Ward neighborhood of New Orleans. Elsewhere in New Orleans on Monday, a man was shot twice in the shoulder and grazed in the face under an I-10 overpass, and three people were wounded when someone opened fire on their car in the Mid-City neighborhood.

A man in his late 40s or early 50s was killed in a targeted shooting at a Valero convenience store on the northeast side of San Antonio, Tex., Monday night. A man in his 20s was shot and wounded in Richmond, Va., Monday night. A 32-year-old man was wounded in the arm when someone opened fire in Rialto, Calif., Monday night. A 28-year-old man was shot in the leg as he walked out of a nightclub in Allentown, Pa., early Monday. Two men, 27 and 31, were shot and wounded after an altercation between two groups at a campsite in Anchorage, Alaska, early Monday. A 21-year-old man was gunned down while driving a truck in Rockford, Ill., Monday afternoon.

William Albert McMillan, 53, was found shot to death inside a home in Butner, N.C., Monday afternoon, and police arrested the victim’s girlfriend, 52-year-old Mildred Michelle Hinton-Davis, at the scene. A man was shot and seriously injured during an argument in the hallway of an apartment complex in Kansas City, Mo., Monday afternoon. Antonio Turner, 19, was killed and a 24-year-old woman was among two people wounded in a shooting in San Francisco’s Bayview District Monday afternoon. Sinuon Sang, 27, was wounded when someone in a passing car opened fire as she sat on a porch with friends on the west side of Columbus, Ohio, Monday night.

Norman Bennett, 29, was found shot in the leg in a garage in Omaha early Monday; he had been shot in the same leg in 2009. Dowayne K. Henry, 20, was killed and a 25-year-old man was injured when someone burst into a backyard party and opened fire in the Laurelton neighborhood of Queens, N.Y., early Monday. Paul Barr, 53, was shot and killed outside a home in Croswell, Mich., Monday morning, and a 29-year-old man was arrested at the scene. Trenni D. Chaney, 37, was wounded during an exchange of gunfire in Jamestown, Ky., early Monday. A 36-year-old man suffering from multiple gunshot wounds took himself to a hospital in Pueblo, Colo., early Monday.

A woman was shot in the hand in southeast Huntsville, Ala., early Monday. Lenezzia Clarke, 18, was shot several times and killed in Springfield, Mass., late Monday. One person was shot in the face and another person was shot in the stomach outside a Hooters restaurant in Butler Township, Ohio, Monday night. Andre Lamar Folsom, 36, was shot to death in the parking lot of a Greenacres, Fla., Walmart early Monday. A man and a woman were injured in a shooting in Hartford, Conn., Monday night.

Robert A. Grundei, 48, was shot and killed during a domestic dispute with his 50-year-old brother, who then shot and critically injured himself, in Huntley, Ill., Monday night; their mother was grazed in the head during the incident. Excalibur Scott was shot and killed during an argument with another man about property in White Center, Wash., Monday afternoon. A man was shot, possibly by a neighbor, in Fenton, Mich., Monday afternoon. Two people were shot during a gang-related argument in a parking lot outside a Hyatt hotel in Clearwater, Fla., Monday evening. In Brooklyn, N.Y., early Monday, a 20-year-old was fatally shot in the neck, and an hour later, another person was shot in the head by a man who suspected him of trying to steal his car.

After a 42-hour reprieve from gunfire, six people were killed and at least 22 were wounded in shootings across Chicago this weekend. Victims include Dashawn Johnson, 17, who was shot in the jaw and killed in the Washington Heights neighborhood; a 17-year-old boy injured in the East Garfield Park neighborhood; and a 17-year-old boy shot in both legs.

According to the Gun Violence Archive, 7,145 people have been injured by gun violence in America and 4,123 have been killed since Jan. 1, 2014. That number includes 14 police officers killed, 447 children injured or killed and 331 instances of defensive gun use.