Houston Airport Shooting Update: Gunman left suicide note, described "monster within," police say

(CBS) HOUSTON - A 29-year-old man who fired at least two shots at Bush Intercontinental Airport in Houston Thursday before turning a gun on himself left a suicide note describing a "monster within," according to CBS affiliate KHOU.

Cornell Marcus Moore reportedly left a suicide note saying he had a "monster within" and wanted the cops to take care of it. The note reportedly said Moore had a bigger plan, but decided to have mercy on others.

KHOU reports he also posted status updates on his Facebook page Wednesday reading "This Life Will Crash Tomorrow!" and "I recently had the chance of staring death in the face, and she was beautiful."

A Homeland Security special agent reportedly confronted Moore and fired at him at the same time that he shot himself in the head, according to the Houston Police Department. An autopsy is expected to reveal whose bullet killed Moore.

No one else was injured in the shooting, police said, but passengers and airport employees were shaken by the event, according to KHOU.

A witness told the station, "There [were] a bunch of people screaming, a bunch of people running, people coming down the escalator the wrong way getting away from it, leaving their bags on the thing."

The terminal where the shooting took place was reportedly closed for about three hours for investigation.  Moore's car was found in the parking lot. The vehicle was reportedly searched and then towed away.

KHOU reports the FBI is assisting with the investigation.

Complete coverage of the Houston airport shooting on Crimesider