Anger and criticisms now are being faced by United Airlines as their security dragged a passenger from his seat due to an overbooked arrangement. Dr. David Dao, 69, was all bloodied when he was forcefully hauled from his pew, on Sunday by an airline staff.

Dao was aboard on United Express Flight 3411 at O'Hare International Airport in Chicago when the incident happened. He was supposed to fly to Louisville to tend to his patients the next day.

United Airlines CEO Oscar Munoz, meanwhile, have called to defend the actions of the airlines' staff, and was reported by Fox News as saying that the passenger has defied security, calling him "disruptive and belligerent." However, Munoz took down what he said and issued an apology afterward.

"While I deeply regret this situation arose, I also emphatically stand behind all of you, and I want to commend you for continuing to go above and beyond to ensure we fly right," said Munoz in a letter obtained my various media outlets. On Sunday, United Airlines have asked four people to give up their seats to allow United crew members to sit on the plane.

The crew offered money to passengers who would offer their seats to accommodate the other crew members. Nobody gave up, which led to United Airlines picking four random passengers to be busted in the plane.

Dao has been receiving medical care in Chicago after he was bloodied in the mouth. He was seen on a viral video saying, "Just kill me," having returned on the plane. His family has issued a statement on Tuesday, saying that they were appreciative of the support.

According to The Guardian, one officer in the removal did not follow the proper protocol and thus had been placed on leave after review. Meanwhile, Gov. Chris Christie, R-N.J. tasked the Transportation Department to append policies where airlines overbook flights and remove passengers at their preference. Gov. Christie called the "incident abusive and outrageous."