2 Killed in Car Crash After Armed Robbery : Crime: Alleged gunman steals money and auto from a teller machine customer and later is involved in a collision. Witnesses chase him and hold him for police.

Quevan Posey’s Wednesday night started with him stealing $300 and ended with him taking two lives, Los Angeles police said Thursday.

Posey, 26, robbed attorney Glenn White at gunpoint and abducted him and his female companion in White’s 1993 Mustang, police said. The lawyer and his companion were dropped off unharmed, but police said Posey drove through a red light on Burlington Avenue later that night and slammed into an oncoming car. The driver of that car and a passenger with Posey were killed.

Posey fled the scene on foot, police said. Witnesses chased him onto a bus and kept him there until police arrived. He was arrested on suspicion of murder with special circumstances.

White said he was withdrawing money from an automated teller machine at 3rd and Gardner streets about 7:30 p.m. when a man police later identified as Posey approached him with a gun. After unsuccessfully trying to grab the gun from the man, White said he was ordered to withdraw $300.

The man then forced the attorney to walk to his car where his friend waited. After the man told him to get in the car, White said, he tried again to grab the gun, thinking he and his friend might be killed otherwise.

But the man hit White with the gun and forced him behind the wheel. He drove for a few blocks until he was told to stop. The man then ordered White and his passenger out of the car and sped away, the lawyer said.

More than three hours later, Posey had picked up a passenger and was driving White’s car at more than 50 m.p.h. north on Burlington Avenue when he ran the red light and hit the eastbound car, police said.

“There was no indication that the (Mustang’s) brakes were hit,” Detective Richard Lopez said. “Both cars looked like crushed tin cans.”

Posey, who was protected by an air bag, managed to struggle out of the car, Lopez said.

Lopez said passersby chased Posey, who was waving a .22-caliber automatic pistol, for about two blocks before he got onto a Metropolitan Transit Authority bus that was stopped at Wilshire Boulevard and Alvarado Street. One man drove his car into the path of the bus so it could not be driven away, Lopez said, and others crowded around the vehicle, refusing to let Posey out.

“Basically, they contained the guy within the bus for about five minutes, until police arrived,” Lopez said. If it were not for the witnesses, he said, Posey “would have been gone. He would have been adios.”