【Watch Mound Daughter】

If the United Airlines passenger recently dragged off a flight looked unconscious in the videos much of the internet has now seen,Watch Mound Daughter that's because he probably was.

The attorney for David Dao — a 69-year-old man who was trying to get from Chicago to Louisville on an April 9 flight — said Dao suffered a concussion and a broken nose after police officers ripped him from his seat and dragged him off the overbooked flight. Dao also lost two teeth and endured sinus damage, according to attorney Thomas Demetrio, who went on to say Dao will undergo reconstructive surgery.

"If you're going to eject a passenger, under no circumstances can it be done with unreasonable force and violence," Demetrio said at a press conference in Chicago on Thursday. "That's the law."

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Dao didn't attend the press conference, but his daughter Crystal was there in his stead.

"What happened to my dad should never have happened to any human being regardless of the circumstance," she said.

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Demetrio lamented corporate mistreatment of customers and passengers as he made a statement and took questions from a crowd of reporters.

"Forget the law for a minute that requires common decency in the treatment of passengers," he said. "But just treat us with respect. Make us feel like you really care."

Demetrio said both United and the city of Chicago bear responsibility for dragging Dao off the plane. Asked whether we can expect a lawsuit, he said "yeah, probably."

Update at 1:00 p.m. ET: United again apologized to Dao after the press conference, issuing a statement that said "we cannot stress enough that we remain steadfast in our commitment to make this right."

The company pledged to "not ask law enforcement officers to remove passengers from our flights unless it is a matter of safety and security," and said they will conduct a review of policies such as overbooking and reveal the results by April 30.

Video credit: Tyler Bridges via Storyful