Runaway psych patient hit by car in San Leandro after 2 carjackings

Dorian Mulder allegedly assaulted two people after fleeing from a psychiatric hospital. Dorian Mulder allegedly assaulted two people after fleeing from a psychiatric hospital. Image 1 of / 1 Caption Close Runaway psych patient hit by car in San Leandro after 2 carjackings 1 / 1 Back to Gallery

A patient who fled a San Leandro psychiatric hospital was arrested after he carjacked a 15-year-old driver, crashed into a garbage truck, made a failed attempt to steal another vehicle and ended up getting hit by a car when he ran onto Interstate 580, authorities said Friday.

Dorian Mulder, 24, of San Leandro, walked away from the John George Psychiatric Hospital about 6:20 p.m. on Thursday and carjacked the teenager who was sitting in a Kia sedan parked at the nearby Fairmont Hospital, officials said.

Mulder drove the car a short distance before crashing into a garbage truck in the hospital parking lot, said Sgt. Ray Kelly of the Alameda County Sheriff’s Office. Following the wreck, Mulder attacked a man standing near another car, punching the victim in the face and biting him on the arm before snatching his car keys, Kelly said.

Unable to get the car in drive, Mulder abandoned the second carjacking and set off on foot toward Interstate 580, Kelly said.

Sheriff’s deputies and police responding to the carjackings found Mulder hiding in bushes along the freeway, Kelly said. When officers confronted him, he ran into traffic and was hit by a car going about 65 mph, Kelly said. But that didn’t stop him. He got up and kept running, Kelly said.

Officers lost sight of him, but used a drone equipped with a thermal imager to find him hiding again in the bushes along I-580 with a broken arm and other injuries, Kelly said.

He was taken to a hospital after being arrested on suspicion of carjacking, kidnapping, felony assault and resisting arrest.

The victims assaulted in the carjackings were treated for injuries, police said.

Kelly said Mulder will be booked into the Santa Rita Jail in Dublin once he is released from the hospital.

Annie Ma is a San Francisco Chronicle staff writer. Email: ama@sfchronicle.com Twitter: @anniema15