David Dao, the passenger forcibly removedfrom a United Airlines flight in an incident that sparked public outcry, suffered severe injuries, Dao's lawyer Tom Demetrio said during a press conference Thursday.Demetriosaid the 69-year-old man lost two front teeth, broke his nose, and suffered a concussion as a result of being dragged off a plane by police officers. Dao will allegedly need reconstructive surgery for his injuries.On Monday, the Chicago Police Department issued a statement saying Dao was taken to Luthern General Hospital for non-life-threatening injuries he suffered to his face after his head struck an armrest. Demetrio said Dao was discharged from the hospital on Wednesday.Demetrio said a lawsuit will be filed in state court after investigative work into the incident is complete.Demetrio said they have two years to file a lawsuit.On Wednesday, Dao issued an orderwith the city of Chicago and United asking to keep all footage, audio recordings, and any other reports and material from the flight.United dragged Dao from the flight when he refused to give up his seat for a crew member. The airline had firstcalled for volunteers to give up their seats for a total of four crew members in exchange for $1,000, but chose passengers to leave when no one volunteered.Dao said at the time he was refusing to give up his seat because he's a doctor and had to see patients the next morning.Dao ran back onto the plane after being forcibly removed by authorities, as seen in a particularly gruesome video of him clutching a curtain saying "I have to go home." Demetrio said he has no memory of trying to return to his seat a second time."He has absolutely zero, nada memory of going back onto that plane. Not a lick of it," Demetrio said.United CEO Oscar Munoz has apologized to Dao and the other passengers on the flight, after first making two statements that were poorly received.SEE ALSO:'It's us against them': man dragged from United flight gears up for legal battle after saying he lost teeth, broke his nose, and had a concussionJoin the conversation about this storyNOW WATCH: United Airlines CEO apologizes after initially calling the passenger 'disruptive' and 'belligerent
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