We know more about the United incident where a passenger was forcibly dragged off a plane (UAL)

An incident report obtained via a public-records request names the three officers involved with dragging David Dao, 69, off a United Airlines flight in an incident that ignited public backlash.

Filed by the Chicago Department of Aviation, the report names three aviation security officers: Mauricio Rodriguez Jr., Steven Smith, and James Long.

The report largely echoes what had previously been relayed by video, witness accounts, and Dao's lawyer Tom Demetrio.

Long, who was primarily involved in the physical altercation with Dao, has been a security officer since July 2015, according to a human-resources report obtained by Business Insider. Smith and Rodriguez became security officers in June 2016.

All three officers have been placed on administration leave until further notice. Long's disciplinary notice says he was placed on leave for "violation of city police or rule" and "conduct involving job performance or substandard work performance."

Rodriguez was the first to board the plane after being told two passengers, Dao and his wife, refused to get off the full flight. Dao refused, according to the report, apparently saying: "I'm not leaving this flight that I paid money for. I don't care if I get arrested." Smith joined Rodriguez a few minutes later.

When both Rodriguez and Smith were unsuccessful in persuading Dao to exit the plane, Long tried to forcibly remove Dao by placing both hands under his armpits and lifting him up, according to the report.

When Dao began to struggle, Long lost control and dropped him, which is when Dao hit his head on an armrest, the report said.

Demetrio previously said Dao lost two front teeth, broke his nose, and sustained a concussion as a result of the scuffle.

"The subject was brought out to the jet bridge area. He was limp so he was laid on the floor," the report said.

A few minutes later, the report said, Dao ran back onto the plane, saying: "I'm not getting off the plane. Just kill me. I want to go home."

Demetrio has said Dao does not remember getting back on the plane.

"He has absolutely zero, nada memory of going back onto that plane. Not a lick of it," Demetrio said.

United first asked for volunteers to give up their seats on the full flight to make room for four crew members who were needed in Louisville. When no one volunteered, the airline invoked its involuntary boarding policy and told people they must give up their seats.

At the time, Dao said he was refusing to give up his seat because he's a doctor and had to see patients the next morning.

United CEO Oscar Munoz has publicly apologized for the incident after first releasing two statements that were poorly received. Dao is planning to sue the airline.