"[Sending law enforcement] to remove a booked, paid, seating passenger - we can't do that". "We can't do that".
Meanwhile, United will compensate all passengers for the cost of the flight in which Dao was forcibly removed by security officers, Bloomberg reported.
United spokeswoman Megan McCarthy said Wednesday that the passengers can take the compensation in cash, travel credits or miles.
The extraordinary move comes following an extraordinary event.
Has United Airlines implemented any policy changes as a result of this incident?
Munoz said he doesn't think Dao was at fault in the incident. There is presently confusion about whether the man on the United flight was actually David Thanh Duc Dao, quite possibly another person entirely to David Anh Duy Dao, the man with the criminal records.
China's Communist Party mouthpiece, People's Daily, said on its social media account on Tuesday that United Airlines was "arrogant and cold-blooded". He described the man as "disruptive and belligerent".
On Wednesday, 21 Senate Democrats demanded a more-detailed account of the incident from Munoz. "I share all of those sentiments", Munoz said in a statement.More news: Trump prepares to unveil tax cut 'principles'
More news: White House to Host Senate North Korea Briefing
More news: 10 killed as landmine blast hits van carrying census workers in Kurram
Fearns says he's consulted his attorney over how he was treated - "like in a cattle car" - and his wife joked about how his trip could have turned into a scene like the one in the viral video.
Dao, a physician who claimed he had appointments with patients the next day, is now undergoing treatment for his injuries at a Chicago hospital.
The passenger, 69-year-old David Dao, has obtained a personal-injury lawyer and asked the Cook County Court to issue an order for United and the city of Chicago to keep all footage, audio recordings, and any other reports and material from the flight, according to the Chicago Tribune. A lawsuit hasn't been filed.
Dao was removed from the flight out of Chicago's O'Hare to make room for United crew members who needed to board to work a different flight. But the agreement doesn't sign away the right to sue if the airline treats a passenger in a manner that breaches the law.
Chicago Aviation Commissioner Ginger Evans will also speak.
Munoz called the incident a "system failure" and said United would reassess its procedures for seeking volunteers to give up their seats when a flight is full. That usually works - of the 475,000 people who lost a seat past year, more than 90 per cent did so voluntarily, according to government figures. Two more officers were suspended Wednesday. When nobody accepted the airline's offer of $800 to relinquish a seat, the airline chose four passengers at random. He refused to leave.
That's when three Aviation Department police officers boarded the plane. Finally, after Dao returned to his seat, four security guards ripped him from his seat and dragged him, unconscious, by his arms, off the plane. Then it's your responsibility to make sure it doesn't look like you're orchestrating a smear campaign behind the scenes.
He committed the third-largest US airline to "a thorough review" of its policies for handling oversold flights and vowed to report back to the public by April 30.