L.A. Shooter Tyler Brehm: Recent Breakup, Drugs May Have Led to Gunman's Rampage

More details are emerging about Tyler Brehm, the gunman who opened fired on drivers in Hollywood on Friday morning injuring at least two men: The Hollywood Reporter’s photo editor, Chris Godley, who suffered an injury to his leg, and music industry executive, John Atterberry, who was shot in the face and neck, who is listed in critical condition at Cedar-Sinai Medical Center.

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Brehm’s ex-girlfriend, Alicia Alligood, came forward on Saturday. She and Hollywood resident, Brehm, had broken up earlier this month after dating for four years, she tells KTLA. She says that may have triggered the rampage.

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She didn’t even know he was the shooter until Saturday morning when she discovered she had 14 text messages on her mobile phone and at least one voice message from Brehm, which was left around 12:30 am on Friday morning, saying that he loved her.

The ex-girlfriend also says that he had been “really stressed out lately” and began taking pills given to him by someone he believed to be a pharmaceutical sales rep. She says that was out of character for him.

"He was very anti-pharmaceutical," Alligood, 24, says of the drug use. She also says he wasn’t the same after he started using them.

Brehm’s Facebook page shows Carlisle, Pa. as his hometown. Alligood says she attended junior high and high school with Brehm in Pennsylvania, but they didn’t start dating until they were in college. She paints a fairly positive picture of Brehm calling him a “humanitarian” who was "extremely motivated to change the world for the better." Apparently, he also managed a nonprofit organization for a friend.

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The two formerly lived together and a neighbor says she heard Brehm yelling from the hallway and banging on their door approximately two weeks ago.

According to his Facebook page, he changed his relationship status to “single” just four days ago. He lists his interests as knowledge, friendship, family, money, success and "things that go fast." Police say he was unemployed.

According to the LA Times, Brehm’s rampage began at 10:19 am on Friday when he began shooting a .40-caliber Smith & Wesson gun into the air and menacing people in their car in a McDonalds parking lot. He then walked toward Sunset Boulevard and Vine Street where he shot at a silver Mercedes-Benz coupe, among others. The driver of the Mercedes-Benz, Atterberry, was hit three times in the neck and face. THR's photo editor, Godley, drove the black truck Brehm shot at, which can be seen in video taken of the incident. No other injuries have been reported, though several cars’ windows were broken by gunfire.

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Brehm continued shooting into the air and at passing cars while witnesses say bystanders were confused thinking it was part of a movie being filmed in the neighborhood.

That may explain why Godley says he was puzzled by men who appeared to be having fun as they ducked away from the gunman's attack.

Pedestrians began to run for cover once they realized the bullets were really hitting the passing cars. Police believe he fired off about 20 rounds, which means he reloaded at least once.

"He was just kind of shooting spontaneously," William Wiles, a Hollywood resident who witnessed the shootings through his window, says. "He didn't really have any mission or purpose or anyone in particular."

The shooting ended at around 10:22 a.m. Two officers, including a motorcycle officer who was off-duty and working on a nearby movie production, asked him to drop the gun. Instead, he pointed it at the motorcycle officer and Brehm was pronounced dead at the scene in what police are calling an "officer-involved shooting."