A newly released timeline of law enforcement operations at the deadly Florida mass shooting last month indicates a school resource officer lingered outside the high school, failed to confront the shooter and ordered fellow officers to stay back from the building where the shots were heard.

The timeline indicates that the shooter had probably left the campus — blending in with crowds of panicked students — by the time officers finally entered the school.

The release of the timeline comes days after Florida Gov. Rick Scott ordered an investigation into the shooting.

Broward County Sheriff’s Deputy Scot Peterson, 54, resigned after the Feb. 14 attack that killed 17 people at Marjory Stoneman Douglas High School in Parkland rather than be suspended without pay pending an internal affairs investigation.


That investigation was still underway this week, a sheriff’s spokeswoman said.

Broward County Sheriff Scott Israel has said Peterson should have entered the school and confronted the gunman.

An attorney for Peterson, a 33-year law enforcement veteran, has defended his client’s actions, saying he heard gunshots but thought they were coming from outside the building.

The timeline, though, indicates he suspected early on that the gunfire was coming from inside the school.


1 / 41 Abigail Avioa, a senior at Marjorie Stoneman Douglas High School, her back to camera, is prayed over in front of the school on Sunday, Feb. 18, 2018. (Carolyn Cole / Los Angeles Times) 2 / 41 People come to pay their respects and leave flowers at Marjorie Stoneman Douglas High School, where 17 students were killed in a mass shooting last week. (Carolyn Cole / Los Angeles Times) 3 / 41 Bicycles still remain on campus as people come to pay their respects and leave flowers at Marjorie Stoneman Douglas High School, where 17 students were killed in a mass shooting last week. (Carolyn Cole / Los Angeles Times) 4 / 41 Brandon Sanchez, 9, prays with his father Victor Sanchez, center, of Coral Springs, Fla., along with other family members and friends in front of Marjorie Stoneman Douglas High School on Sunday, Feb. 18, 2018. (Carolyn Cole / Los Angeles Times) 5 / 41 Hearts with the names of some of those killed are hung on the fence at Marjorie Stoneman Douglas High School. (Carolyn Cole / Los Angeles Times) 6 / 41 Lauren Fitzsimmons, 12, left, and Ed Staszeski pray during a service at First Church Coral Springs where prayers were said for the victims of the high school shooting. (Carolyn Cole / Los Angeles Times) 7 / 41 Pastor Vance Rains leads prayers for the victims of the school shooting at First Church Coral Springs. (Carolyn Cole / Los Angeles Times) 8 / 41 Students gathered at the memorial crosses at Pine Trails Park in Parkland, Florida to remember those where were killed and injured in the shooting. (Carolyn Cole / Los Angeles Times) 9 / 41 Isabella Cristancho, 14, left, Valentina Piedrahita, 14, and Paula Mantilla, 13, far right, protest on a corner not far from Marjorie Stonemason Douglas High School in Parkland, Florida where a gunman killed 17 dead and injured 14 in a school shooting. (Carolyn Cole / Los Angeles Times) 10 / 41 Family members greet one another as they arrive for the memorial and burial for Meadow Paddock, age 18, one of the shooting victims at Marjorie Stonemason Douglas High School. (Carolyn Cole / Los Angeles Times) 11 / 41 Sarah Cardenas, age 38, brings some of her students from Classical Conversation (home school) in Boca Raton to the memorial for the victims of the shooting at Marjorie Stonemason Douglas High School in Parkland, Florida where a gunman killed 17 dead and injured 14 in a school shooting. “We came to pay our respects and pray,” says Cardenas. (Carolyn Cole/Los Angeles Times) (Carolyn Cole / Los Angeles Times) 12 / 41 Isaah Jean, age 14, is a freshman at Marjorie Stonemason Douglas High School and was in the freshman building and saw the gunman. The only thing he thought to do was throw his phone at the gunman. He fractured his ankle trying to run from the shooting and is now on crutches. (Carolyn Cole / Los Angeles Times) 13 / 41 Mourners hold a prayer vigil for victims at Parkridge Church in Coral Springs, Fla. (Rhona Wise / AFP/Getty Images) 14 / 41 Thousands gather for an evening vigil at Pine Trails Park in Parkland, Fla. to remember those killed and injured in the shooting at Marjory Stoneman Douglas High School. (Carolyn Cole / Los Angeles Times) 15 / 41 Thousands gather for an evening vigil at Pine Trails Park in Parkland, Fla. to remember those killed and injured in the shooting at Marjory Stoneman Douglas High School. (Carolyn Cole / Los Angeles Times) 16 / 41 Thousands gather for an evening vigil at Pine Trails Park in Parkland, Fla. to remember those killed and injured in the shooting at Marjory Stoneman Douglas High School. (Carolyn Cole / Los Angeles Times) 17 / 41 Thousands gather for an evening vigil at Pine Trails Park in Parkland, Fla. to remember those killed and injured in the shooting at Marjory Stoneman Douglas High School. (Carolyn Cole / Los Angeles Times) 18 / 41 Antonina Messina, 17, a student at Marjorie Stonemason Douglas High School, left, attends a vigil with her mother Clara Messina, center, and brothter, Matteo Messina, right. (Carolyn Cole / Los Angeles Times) 19 / 41 Students gather for a memorial at Parkridge Church in Coral Springs, Fla., one day after a gunman killed 17 people at Marjory Stoneman Douglas High School in nearby Parkland. (Carolyn Cole / Los Angeles Times) 20 / 41 Broward County school board members Robin Bartleman, left, and Rosalind Osgood, second from left, and Chaplain Robert Ossler of the City of Cape Coral Fire/Emergency Department, pray for the victims of the mass shooting after a news conference. (Carolyn Cole / Los Angeles Times) 21 / 41 Balloons are released Thursday at the end of a vigil for victims of the mass shooting at Marjory Stoneman Douglas High School in Parkland, Fla. (Carolyn Cole / Los Angeles Times) 22 / 41 Marla Eveillard, 14, grieves with friends before the start of a community prayer vigil in Coral Springs, Fla. (Carolyn Cole / Los Angeles Times) 23 / 41 Reunited relatives leave the Marriott Coral Springs Hotel on Wednesday night after a deadly shooting at Marjory Stoneman Douglas High School. (Matt McClain / Washington Post) 24 / 41 Florida Gov. Rick Scott speaks to the media as he visits Marjory Stoneman Douglas High School in Parkland, Fla., after a shooting there killed 17 people. (Joe Raedle / Getty Images) 25 / 41 Parents meet at a hotel to pick up their children after the shooting at nearby Marjory Stoneman Douglas High. (Jim Rassol / South Florida Sun-Sentinel) 26 / 41 Students released from a lockdown embrace after the shooting at Marjory Stoneman Douglas High School in Parkland, Fla. (John McCall / South Florida Sun-Sentinel) 27 / 41 Students at Marjory Stoneman Douglas High School after the lockdown ended. (John McCall / South Florida Sun-Sentinel ) 28 / 41 People are brought out of Marjory Stoneman Douglas High School after a gunman opened fire Wednesday. (Joe Raedle / Getty Images) 29 / 41 Students are escorted by police following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla. (Amy Beth Bennett / South Florida Sun-Sentinel) 30 / 41 Parents wait for news after a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday. (Joel Auerbach / Associated Press) 31 / 41 Parents and family members gather south of the Marjory Stoneman Douglas High School campus following a shooting in Parkland, Fla. (Amy Beth Bennett / Associated Press) 32 / 41 Anxious family members wait for news of students after a shooting at the school in Broward County in southeast Florida. (Wilfredo Lee / Associated Press) 33 / 41 Medical personnel tend to a victim after the mass shooting. (John McCall / South Florida Sun-Sentinel ) 34 / 41 People gather waiting for word from students following the mass shooting. (Amy Beth Bennett / South Florida Sun-Sentinel ) 35 / 41 A law enforcement officer rushes toward Marjory Stoneman Douglas High School following a shooting at the school in Parkland, Fla. (John McCall / Associated Press) 36 / 41 Anxious family members wait south of the campus at which more than 3,000 students are enrolled. (Amy Beth Bennett / South Florida Sun-Sentinel ) 37 / 41 In this frame grab from video provided by WPLG-TV, students follow law enforcement out of the building. (Associated Press) 38 / 41 Family members embrace a student who was released from the school. A shooting at the school sent students rushing into the streets as SWAT team members swarmed in and locked down the building. (Wilfredo Lee / Associated Press) 39 / 41 A law enforcement officer tells anxious family members to move back after a shooting at Marjory Stoneman Douglas High School in Parkland, Fla. (Wilfredo Lee / Associated Press) 40 / 41 Anxious family members wait for information on students in Parkland, Fla. Multiple deaths were reported Wednesday as gunfire broke out at Marjory Stoneman Douglas High School. (Wilfredo Lee / Associated Press) 41 / 41 Students hold their hands up as they are evacuated on Wednesday, in a frame grab from WPLG-TV. (Associated Press)

Former student Nikolas Cruz, 19, was indicted Wednesday on 17 counts of first-degree murder and 17 counts of attempted murder.

On Friday, the Broward County Sheriff’s Office released updated statements following a timeline of the shooting they posted online based on video surveillance from the school and radio dispatches that appear to contradict the statement from Peterson’s attorney.

The Sheriff’s Office also released dispatch audio recordings, 911 calls, police reports and statements clarifying its position on the response. Media have sued for access to the school surveillance footage, which a judge was reviewing Friday before ruling on whether to release it.


“Surveillance video from outside Marjory Stoneman Douglas High should be released publicly,” the Sheriff’s Office tweeted. “Legal exemptions block the release unless a judge approves. The judge took it under advisement and we hope for a ruling shortly.”

According to the sheriff’s timeline, an Uber driver dropped Cruz at the sprawling high school campus at 2:19 p.m. He entered Building 12 two minutes later and within seconds began shooting. At 2:22 p.m., the school’s fire alarm sounded and the first 911 call was received. Peterson was at a nearby administration building.

“We have possible, could be firecrackers. I think we have shots fired, possible shots fired —1200 building,” Peterson radioed at 2:23 p.m.

The gunman had arrived at Building 12, known to students as the freshmen building because so many had classes there, and appeared to remain for the duration of the shooting. Of the 14 students killed, nine were freshmen, seven of them just 14 years old.


“Get the school locked down, gentlemen!” Peterson can be heard shouting on the radio soon after. “We also heard it’s by, inside the 1200.”

Other deputies arrived and said they heard shots by the football field — something Peterson mentioned in a statement released last month by his attorney, Joseph DiRuzzo, insisting he stayed outside because he thought shots were coming from outside the buildings.

The Sheriff’s Office “trains its officers that in the event of outdoor gunfire one is to seek cover and assess the situation in order to communicate what one observes with other law enforcement,” the statement said.

DiRuzzo did not return calls or email Friday.


The Sheriff’s Office released a statement this week noting that since 2014, personnel have attended new active-shooter training and received periodic refreshers.

At 2:27 p.m., six minutes after authorities said Cruz entered Building 12, the shooting stopped. Police said Cruz tossed aside his AR-15 rifle and fled. Seconds later, Peterson radioed for officers to “stay at least 500 feet away.”

A dispatcher repeated, “Stay away from 12 and 1300 building.”

Coral Springs Police Officer Tim Burton had just arrived at Douglas High and radioed the first, accurate description of Cruz: “White male with ROTC uniform burgundy shirt.”


At 2:29 p.m., Burton met Peterson outside Building 12. Another deputy called for a command post to be erected. Yet another radioed for added units, “so we can try to find this guy.”

“Do we have a perimeter set up right now and everyone cleared out of the school?” Sheriff’s Capt. Jan Jordan said.

“Negative,” a dispatcher replied.

It was 2:31 p.m., 10 minutes after the shooting had started.


A minute later, four officers entered the school for the first time to “extract a victim,” according to the timeline.

In a statement, the Sheriff’s Office noted: “By then, the suspect had been gone from building 1200 and his whereabouts were unknown. A perimeter is a secondary task that would be appropriate to apprehend the suspect, stop him from entering the neighboring middle school and prevent non-first responders (responding parents) from coming on the school property while it was on lockdown.”

But by then, Cruz was already blocks away at a Wal-Mart, where he bought a drink. At 3:40 p.m., he was spotted by a Coconut Creek police officer and arrested without incident.

The Florida Department of Law Enforcement is investigating the shooting response by all agencies, said spokeswoman Gretl Plessinger. She said investigators were assembling documents Friday, still preparing for interviews, and didn’t expect results for months.


molly.hennessy-fiske@latimes.com

@mollyhf