Eric Thayer/Reuters

On the eve of the one-year anniversary of the massacre at Sandy Hook Elementary, USA Today has published an interactive about mass killing in America called “Behind the Bloodshed.” Examining F.B.I. data, which defines a mass killing as four or more victims, a team of reporters found that since 2006, there have been more than 200 mass killings in the U.S. They also found that such massacres occur far more often than the government reports.

The newspaper also found that 77% of mass killings involve a gun. And nearly a third of the victims were younger than 18—363 children killed in the last eight years. Most child victims died at the hands of someone they knew; more than a third were killed by a blood parent. Only a quarter were killed by someone they didn’t know, as was the case in Newtown.

“There is sort of this myth that our children aren’t exposed to these types of things, that it’s rare,” John Fairbank, co-director of the UCLA-Duke University National Center for Child Traumatic Stress, told the paper. “But it’s not rare. Children are exposed at high rates.”

Katrina Yuzefpolsky was 8 years old when nine of her family members were shot and killed by a mentally unstable relative at a Christmas party in Covina, Calif., in 2008. Dressed as Santa Claus, Bruce Jeffrey Pardo, who had been married to Katrina’s aunt, had a seamstress build extra room into his costume to accomodate his firearms. A bullet tore through Katrina’s cheek, but she, her parents and her sister fled the scene and survived.

Now 13, she has just begun discussing the origin of her scar in school, where she was named most likely to become president. If that prediction ever comes true, she said, “I would tell everyone that they’d have to get rid of their guns.”

Here is today’s report.

—Jennifer Mascia

Ja’Roderick Smith, 15, was shot in the face and stomach in the bus loop at West Orange High School in Orange County, Fla., Wednesday afternoon. J’Morian Eddie Patrick Bell, 17, who had fought with the victim, was charged in the shooting. “I got nothing to say to y’all fools, man,” Bell said as he was led away.

—WFTV.com

Eric Cuesta, 16, was shot and killed while sitting in a minivan near a church in Providence, R.I., Wednesday afternoon. Louis Pena, 20, was arrested. The motive is under investigation. Police believe the shooting stemmed from an argument.

—ABC6.com

Nineteen-year-old Ondrea Japonica Stevenson, who was 13 weeks pregnant, was killed when someone fired four bullets into her west Charlotte, N.C., apartment as she slept on a couch Wednesday morning. Police have not disclosed whether the victim was the intended target. Neighbors said her killer may have been looking for the father of her child.

—Charlotte Observer

Two men were shot and killed and another man was wounded in an attempted robbery in Wingate, N.C., Wednesday’s afternoon. Daniel Steven Sheerer and Tony Antwone Knotts were arrested later that night. The pair subsequently confessed to breaking into several homes in the area.

—WSOCTV.com

A woman was shot and killed in the parking lot of an auto repair business in north Austin, Tex., early Wednesday. Witnesses heard five or six shots and saw a white sedan leaving the scene. The victim was brought to the hospital and died less than an hour later. The man who brought her is being questioned.

—Statesman.com

Two would-be robbers were shot, one fatally, on Highway 58 in Chattanooga, Tenn., Wednesday night. Police said a man met the two in a parking lot to purchase several computer tablets. When one of the men produced a firearm and demanded his money, the robbery victim was able to pull his own firearm in self-defense, fatally shooting one and critically wounding another. The surviving suspect will be charged.

—WRCBTV.com

James Vester, 23, was shot and killed during a robbery at an apartment complex on the west side of Indianapolis, Ind., Wednesday afternoon. The victim did not live at the complex, but went there to buy an iPad in what may have been a set-up. It is the city’s seventh homicide in four days. Anyone with information is asked to call police.

—TheIndyChannel.com

Dylan Kane, 21, and Sean Pino, 26, were shot and killed after forcing their way into a home in Palm Bay, Fla., early Wednesday. The men broke in following an argument with two men who lived there. One of the residents, Stephen Wright, 23, grabbed his firearm and opened fire. Police are trying to determine how many shots were fired, where the men were shot and how they knew each other.

—FloridaToday.com

Chenard Treadwell, 26, was fatally shot in the stomach in Euclid, Ohio, Tuesday night. Police have not identified a suspect. Mayor Bill Cervenik said the shooting was likely drug-related.

—Cleveland.com

A man was killed and his ex-wife was critically wounded in a shooting inside a home in Pearland, Tex., Wednesday afternoon. Police said it could be a murder-suicide attempt. Neighbors said the woman, who lives at the house with her 8-year-old son, had been divorced for at least two years, but her ex-husband, a former Marine, remained close to her and their child.

—KHOU.com

A 20-year-old man was found shot to death in his car on the east side of Detroit, Mich., early Wednesday. Police say the victims’s pants were down around his ankles. They don’t yet have a motive.

—WXYZ.com

One person was killed and another person was critically wounded in a shooting in Madera, Calif., Wednesday night. A witness said the victims were in their car when at least two men in another car opened fire. Anyone with information is asked to call police.

—The Fresno Bee

Tratavious Davon Oliver McDuffie, 18, was shot and killed in Roanoke, Va., Wednesday afternoon. Police said a friend was handling a firearm when it discharged. No charges have been filed.

—WSLS 10

A woman was shot and wounded at an apartment complex in St. Clair County, Ill., Wednesday night. The shooting is believed to be the result of a domestic dispute. Police are searching for a man who fled the scene.

—BND.com

A 43-year-old man was shot in the chest and seriously wounded in Fayetteville, N.C., Wednesday afternoon. The victim was found lying in the road next to his van. Two men spotted running from the scene are considered armed and dangerous.

—FayObserver.com

A man shot his next-door neighbor before killing himself in a Simi Valley, Calif., cul-de-sac Tuesday morning. The 61-year-old woman’s body was found in front of a neighbor’s house. A large-caliber handgun, which was legally registered, was recovered at the scene. Police had previously responded to several calls for service at the shooter’s address.

—Ventura County Star

A woman in a car was wounded when someone opened fire at an intersection in Lincoln Heights, Ohio, Wednesday afternoon. A bullet struck a nearby school bus but no children were injured. The school was locked down as a precaution.

—The Blade

A man was shot in the buttocks during an altercation outside a friend’s house in Lacombe, La., Tuesday afternoon. The victim said that after a physical fight, Oliver “Olly” Cousin opened fire. A warrant has been issued for Cousin.

—The Times-Picayune

A man was injured when a neighbor fired dozens of rounds from his yard on the south side of Des Moines, Iowa, Wednesday afternoon. Bullets fired by Steven J. Vogel, 38, shattered windows in vehicles and hit houses. His criminal record includes multiple gun charges; in 2008 he was ordered to turn all of his guns over to authorities.

—Des Moines Register.com

One person was shot in the neck in Hartsville, S.C., Wednesday night. A 21-month-old child was fatally shot on the same street on Monday. The child’s parents have been charged in connection with that shooting.

—CarolinaLive.com

A 36-year-old man was shot in the leg and another man was injured in separate shootings in Milwaukee, Wis., Wednesday night. No one has been arrested.

—Fox6Now.com

A man was injured after a fight escalated to a shooting in the parking lot of an apartment complex in Kill Devil Hills, N.C., Tuesday afternoon. James Morris Rose III, 33, faces one count of assault with a deadly weapon with intent to kill.

—The Outer Banks Voice

According to Slate’s gun-death tracker, an estimated 11,200 people have died as a result of gun violence in America since the Newtown massacre on December 14, 2012.