The company apologized for the episode, in which a 71-year-old man was pushed to the floor at George Bush Intercontinental Airport in Houston. - From https://www.nytimes.com/2017/06/14/travel/united-airlines-apologizes-after-2015-video-shows-worker-shoving-customer.html?smid=tw-nytimes&smtyp=cur&_r=0
The airline issued an apology, but only after video of the episode was made public.
The Houston television station KPRC broke the story on Tuesday when it obtained the surveillance video, from July 21, 2015, showing a customer service agent shoving a 71-year-old man to the floor near check-in kiosks.
The release of the video follows a high-profile altercation in April, when a United passenger, David Dao, was dragged violently from his seat on an overbooked flight after he refused to give it up.
Tigner requested a new boarding pass, saying that the original was illegible, but was denied by the airline, KPRC reported.
Tigner returned to the counter he was again rebuffed.