Video of this incident was taken by other passengers and it showed Dao being dragged up the plane aisle and with a bloodied mouth, causing public outrage that could not be calmed even by the initial response of the airline.
The officer started working as an aviation security officer on January 25, 2015, records show.
"Disturbance, Charlie 3, on the aircraft".
In a separate report released on Monday, labeled a "Hospitalisation Case Report", the Chicago Police Department said Dr Dao was observed striking his face against an armrest as aviation officers "attempted to escort" him from the flight.
Aviation police officer James Long, who was seen pulling Dao, claimed in the report that the doctor put up resistance.
One quote from the documents that stands out: officers describe only using "minimal but necessary force to remove the subject". At some point, it said, he ran back to the aircraft, held onto to a pole inside and said, "I'm not getting off the plane. I want to go home".
Russian heptathlete stripped of Beijing 2008 bronze
Samples are stored for a decade, and for the 2008 and 2012 re-tests Russian Federation has had the most positive cases per nation. She finished fifth in in 2008 but has climbed to third after doping bans for Ukraine's Lyudmila Blonska and Chernova.
Bill O'Reilly to release first podcast episode since Fox News firing
O'Reilly said the podcast, normally reserved for premium or paid members, will be free this week, Monday through Thursday nights. But I can tell you that I'm very confident the truth will come out. "There's a lot of stuff involved here", he continued.
Labour government would seek to create four new bank holidays
He said a Labour government would hold an immediate defence review, adding: "We haven't completed work on the manifesto". Mr Corbyn was making his second speech of the day in Scotland, and his 13th appearance in the election campaign.
Previously released cellphone video shows Dao back on the plane in a terrified state. In the video, Dao suffered noticeably head injuries, and another video caught him whispering to himself that he wished he were dead.
The commissioner also referred to the uniform controversy that would surface later during the City Council hearing - that she had ordered aviation officers in January to remove the word "police" from their uniforms, but at least one of the responding officers had the word "police" on his jacket.
Demetrio said Dao is planning a lawsuit against United Airlines.
Dao - a 69-year-old physician from Kentucky who was involuntarily bumped to make room for United crewmembers en route to another job - allegedly acted "violently" and yelled, "I am not leaving this flight that I paid money for". Just two weeks after the United incident, another video surfaced in the social media where a male flight attendant from American Airline was shown forcefully taking away a stroller from a sobbing mother with twins, in which other passengers said the stroller nearly hit the babies' heads, according to Travel Pulse. United at first compounded the flap with an initial quasi-apology and a letter to employees that called Dao "disruptive and belligerent". On Tuesday, he was asked if the company ever considered firing anyone, including management. For me personally, I'd add shame. He noted that the board of United Continental Holdings Inc. has supported him. "There was never a consideration for firing an employee".
During boarding of a flight from San Francisco to Dallas, American Airlines passenger Surain Adyanthaya observed an American Airlines flight attendant strike a woman, while abruptly taking her child's stroller.
"No it's something with an oversold, involunteer [sic] something like that", the caller responded.
Munoz has pledged a full review of the incident by April 30 "to fix what's broken so this never happens again".