Chicago Department of Aviation officers used “minimal but necessary force” when they dragged a passenger off a United Airlines flight earlier this month, according to an incident report.

The report from the department describes what the officers say happened April 9, on United Express Flight 3411. It says that the passenger, David Dao, was “aggressive” and “violently” swung his arms at officers, who then had to forcibly remove him from the plane.

The encounter — captured on videos taken by other passengers– along with the airline’s handling of the aftermath, caused international outrage and a prolonged public relations nightmare for United.

According to the report, flight crews called security officers because a passenger, Dao, was yelling and refusing to leave the aircraft. A United official earlier told passengers that it needed four volunteers to give up their seats for off-duty crew members. But no one volunteered, so the airline chose the passengers. Three agreed to leave, but Dao, a 69-year-old Kentucky resident, refused.

Three officers tried several times to persuade Dao to give up his seat, the report says, but  Dao “responded repeatedly in an aggressive manner.”

“I’m not leaving this flight that I paid money for. I don’t care if I get arrested,” he told one of the officers, according to the report.

The report says Dao became increasingly combative and began swinging his arms with his fists closed after one of the officers tried to grab him. It says the officer was able to pull Dao up from his seat and toward the aisle, but then lost his grip because Dao kept fighting.

United Airlines said a man wouldn’t give up his spot on a flight. According to witnesses, he was pulled screaming from his seat by security and back to the terminal at Chicago’s O’Hare International Airport. (The Washington Post)

That’s when Dao fell and hit his mouth on the armrest, according to the report, which was released along with several other documents and audio files as part of a public records request filed by the conservative watchdog group, Judicial Watch. Dao’s lawyer said he suffered a broken nose and lost two teeth, but the police report makes no mentions of those injuries saying only that Dao suffered a “mouth injury.”

At some point, Dao went limp. Videos taken by other passengers show him bleeding from the mouth as he was dragged off the plane.

The report says Dao was taken to the jet bridge, where he laid down and told the officers that he’s diabetic. At some point, it said, Dao ran back to the aircraft, held on to a pole inside and said: “I’m not getting off the plane. Just kill me. I want to go home.”

Dao was again removed from the plane and eventually agreed to be taken to a hospital.

Judicial Watch obtained audio from the city of Chicago of emergency workers and Dept., of Aviation police officers about the United Flight 3411 disturbance. (Judicial Watch)

The incident happened at Chicago’s O’Hare International Airport, onboard a flight headed to Louisville. The officers involved have been placed on leave.

“Judicial Watch recognizes the broad public interest in the removal of Mr. Dao from the United Airlines flight,” Judicial Watch President Tom Fitton said.  “These records provide a dramatically different account of the incident than seen on the infamous video.”

Even so it’s not clear that the release of the additional documents will sway public opinion, which has been largely in Dao’s favor.

Outrage over the incident was compounded by the airline company’s initially muted response to it. United Chief Executive Oscar Munoz released a statement the day after the incident apologizing for “having to re-accommodate” the passengers. But in a letter he sent to United employees, Munoz appeared to blame Dao, saying he “refused” to cooperate after he was “politely asked” to leave, prompting flight crews to call for help.

Two days later, Munoz issued a more humble apology, saying he was “disturbed” by what happened and that he “deeply” apologizes to Dao. By then, United’s stock prices had plummeted and outrage had reached China, where public anger was fueled by reports that Dao is Asian. He is originally from Vietnam.

United has since changed its policies so that crew members will no longer be allowed to displace passengers who are already seated on the plane. Off-duty airline crews are now required to check in at least an hour before a flight leaves. The purpose is to avoid having to find a seat for a crew member after all the passengers have already boarded.

United also will no longer ask law enforcement officers to remove passengers from flights “unless it is a matter of safety and security,” according to a statement.

Munoz, who was awarded “Communicator of the Year” by PRWeek just a month before the public relations debacle, also promised further review of the airline’s policies and to release a public report by Sunday.

But Munoz’s assurances have so far done little to convince lawmakers that broader changes aren’t necessary.

A group of Democratic senators said this week that United hasn’t responded to its questions about the incident.

“I am disappointed and troubled that United Airlines has so far failed to answer basic questions about the troubling incident aboard Flight 3411,” said Sen. Margaret Wood Hassan (D-N.H.). “No passenger should ever experience the mistreatment that we all saw on that United flight. I will continue to use all of the tools at my disposal, including introducing legislation later this week, to help prevent such an incident from happening again and to strengthen consumer protections for the flying public.”

Hassan, along with Sens. Brian Schatz (D-Hawaii), Richard J. Durbin (D-Ill.) and Charles E. Schumer (D-N.Y.), sent a letter to Munoz demanding a more detailed account of what happened on the plane and a clearer understanding of the airline’s policy on removing ticketed passengers after they’ve boarded a flight. The senators have yet to receive a response.

United and the Chicago Department of Aviation also have not responded to a separate set of questions from leaders of the Senate Commerce Committee.

In a letter sent to leaders of the Senate’s Commerce, Science and Transportation Committee and the subcommittee on aviation operations, safety and security, Munoz outlined concrete actions the airline as taken in light of the dragging incident. He said United will provide answers no later than Thursday.

Likewise, Ginger S. Evans, head of the Chicago Department of Aviation, which manages O’Hare, and the officers involved in the incident, asked for more time to respond.

A few lawmakers have indicated plans to introduce legislation in response to the incident.

Rep. Neal Dunn (R-Fla.) said last week that he plans to introduce a bill that would prohibit airlines from involuntarily removing paying passengers from a flight to make room for other passengers or crew members when there are no empty seats left.

“Passengers should have the peace of mind to know they will not be dragged off a plane once they’re in their seat,” Dunn said in a statement.

Sen. Richard Blumenthal (D-Conn.) had sent a letter to Transportation Secretary Elaine Chao demanding a “swift, sweeping investigation into United Airlines and the industry practices that led to this incident.”

Blumenthal said in an earlier statement that he’s working on a “passenger bill of rights.”

Dao, a doctor from Kentucky, suffered a serious concussion, a broken nose and other injuries. He also lost two of his teeth, according to his attorney, Thomas Demetrio.

Demetrio had said that his client will “probably” sue United.