A man dragged screaming off a United Airlines flight described his ordeal as more horrifying than his experiences in the Vietnam War.
Attorneys for Doctor David Dao, who lost two front teeth and suffered a broken nose and significant concussion in the incident, say they will sue.
His daughter, Crystal Dao Pepper, told the news conference in Chicago they are sickened by his treatment.
Video of the incident has been watched millions of times online.
Law enforcement officials dragged Doctor Dao off Sunday evening’s Chicago to Louisville, Kentucky, flight because it was fully booked, and the airline wanted four passengers to make way for staff members.
The 69-year-old Vietnamese-American physician had refused to leave, saying he needed to go home to see his patients.
Doctor Dao’s lawyers have filed an emergency court request for the airline to preserve evidence ahead of a hearing next Monday morning.
The filing with an Illinois state court demands that United Airlines and the city of Chicago preserve all surveillance videos, cockpit voice recordings, passenger and crew lists related to the flight.
United Airlines said it would refund the ticket costs of all passengers on Sunday’s flight.
His lawyer said Doctor Dao was released on Wednesday night from a Chicago hospital, and that he planned to have reconstructive surgery.
Chicago Department of Aviation says the three aviation security officers involved in removing Doctor Dao from the plane have been placed on leave.