WATCH: Horrific Moment Gunman Executes a Stranger on LA Metro

LAPD has released horrific CCTV footage showing the moment a gunman shot a stranger on a subway platform at point-blank range in the back of the head.

The incident took place in November 2001 at Willowbrook/Rosa Parks Metro station in Los Angeles.

The victim appeared to be standing on the platform and talking on a cell phone when the gunman, now named John Anthony Holenbeck, 28, approached the victim, David Koliba, 40, from been waiting for a train when Holenbeck followed him along the platform and proceeded to shoot him in the back of the head, execution-style.

Four deputy officers who had been alerted to the incident made their way up the stairway and onto the platform. At this point, the footage shows the gunmen jumping down from the platform onto the railroad tracks, dropping the pistol from his pocket in the process. The cops shouted at the suspect to stop, but he didn’t comply.

Holenbeck can be seen in the video scrambling to pick up the weapon before pointing it at cops on the platform and opening fire. Cops engaged in a shoot-out with Holenbeck. He fell to the ground injured by a bullet and later died in hospital.

It is unclear why Holenbeck decided to target Koliba, who sustained a gunshot wound to the head and died at the scene. It did not appear that the two men exchanged any words before the incident, and police revealed that they were complete strangers. Read more