It states in his email 'the involuntary denial of boarding process was initiated' and the passengers was 'denied boarding'.....he looked pretty damned 'boarded' sat in his seat when they tried to physically remove him! Catastrophic
PR disaster for UA and they are ultimately responsible for overbooking. The good Dr's seat is going to cost UA an awful lot of money in lost bookings, I'll bet money that Dr's seat is going to be the most expensive seat UA has ever sold!