DENVER (CBS4) – CBS4 has obtained video of the moments before and after a woman was reportedly sexually assaulted in the councourse at Denver International Airport.

READ MORE: Denver Weather: It Finally Feels Like December, But The Unprecedented Wait For Snow Continues

Noel Bertrand, a former Marine, is facing one count of sexual assault.

At 11:58 p.m. on April 11 the woman and the man who appears to be Bertrand are seen walking together to a gate on the largely deserted A Concourse.

Denver International Airport security video (credit: CBS)

The trouble happened about a half hour later. The alleged victim claimed three airport employees passed by doing nothing at 12:30 a.m.

Two Frontier mechanics — Kris Musil and Mark Adams — wound up being the ones who intervened.

READ MORE: Low Temperatures Help Firefighters Battling West Ranch Fire In Jefferson County

“He had made some comments how ‘I guess you don’t know the difference between rough sex and fighting,'” Adams told CBS4.

Less than two minutes later more help arrived and Bertrand was arrested.

The mechanics said the victim in the case was very shaken up afterwards.

“She was crying, of course, and was having a hard time breathing. She asked me if I would get her bag her suitcase for her and she grabbed an asthma inhaler and took a couple of puffs off it,” he said.

Although the incident itself cannot be seen on the video, the tapes are expected to be used as evidence.

MORE NEWS: Building Catches Fire In Greenwood Village

Bertrand has a scheduled court appearance on Thursday.