A former Chicago aviation security officer who was fired after dragging a man off a flight last year has filed a lawsuit against the airline and city.
James Long is suing Chicago's Department of Aviation (CDA), its commissioner and the city, alleging he was not trained on how to use force.
He was sacked after removing David Dao from the plane last April to make room for United Airlines employees.
Video footage of the incident sparked international outcry on social media.
The ordeal led to demonstrations at Chicago's O'Hare International Airport and turned into a public relations disaster for United Airlines.
The 69-year-old Vietnamese-American physician was forcibly removed after refusing to give up his seat to airline employees on a flight from Chicago to Louisville, Kentucky on 9 April last year.
United Airlines incident: What went wrong?
United Airlines' public relations disaster
Dr Dao, who lost two front teeth, suffered a broken nose and a "significant" concussion, later reached a settlement with United Airlines for an undisclosed amount of money. The airline also apologised for how he was treated.
His lawyer has said that Dr Dao found the experience "more horrifying and harrowing than what he experienced when leaving Vietnam".
James Long is suing Chicago's Department of Aviation (CDA), its commissioner and the city, alleging he was not trained on how to use force.
He was sacked after removing David Dao from the plane last April to make room for United Airlines employees.
Video footage of the incident sparked international outcry on social media.
The ordeal led to demonstrations at Chicago's O'Hare International Airport and turned into a public relations disaster for United Airlines.
The 69-year-old Vietnamese-American physician was forcibly removed after refusing to give up his seat to airline employees on a flight from Chicago to Louisville, Kentucky on 9 April last year.
United Airlines incident: What went wrong?
United Airlines' public relations disaster
Dr Dao, who lost two front teeth, suffered a broken nose and a "significant" concussion, later reached a settlement with United Airlines for an undisclosed amount of money. The airline also apologised for how he was treated.
His lawyer has said that Dr Dao found the experience "more horrifying and harrowing than what he experienced when leaving Vietnam".