The District Attorney’s Office on Tuesday filed charges against a Whittier driver who was allegedly racing another car when he triggered a 10-vehicle crash on the 5 Freeway in Commerce that killed three people and injured four others.

The California Highway Patrol is still looking for the other racer. Three men remain hospitalized Tuesday. CHP Officer Doris Peniche said two are in critical condition.

Jane Robison, a spokeswoman for the District Attorney’s Office, said 35-year-old Dealio Lockhart was charged with three counts of second-degree murder and four counts of reckless driving on a highway causing a specified injury.

If convicted, she said Lockhart faces up to life in prison.

Lockhart’s Tuesday arraignment at the Clara Shortridge Foltz Criminal Justice Center in Los Angeles was continued to April 6, said Shiara Davila-Morales of the DA’s Office.

UPS driver Scott Treadway, 52, of Mira Loma, 18-year-old Brian Lewandowski of Santa Clarita and 19-year-old Michelle Littlefield of Santa Clarita were killed in the Saturday crash. Lewandowski was the son of Lt. Victor Lewandowski who works in the Sheriff’s Homicide Bureau.

The two teens were students at College of the Canyons and were coming back from Disneyland, CHP and college officials said.

Treadway died from multiple blunt force injuries, Lewandowski from blunt force trauma and Littlefield from blunt force injuries of the head, according to the Coroner’s office.

Peniche said Lockhart was driving a Dodge Challenger and racing a Dodge Charger southbound on the 5 Freeway, north of Triggs Street in Commerce, at 12:01 a.m. Saturday.

Lockhart tried to go around a slower moving vehicle ahead of him, she said. He stepped on the brakes, lost control and hit the left side of a UPS tractor trailer.

Peniche said the UPS truck hit the center median, became airborne, struck a Nissan sedan and sheered the top off the car. She said the tractor trailer came to rest on top of a Chevrolet TrailBlazer and Toyota Prius traveling on the northbound 5 Freeway.

The UPS truck burst into flames.

A Honda Civic hit the UPS truck, she said. Debris from the crash hit a Chevrolet Tahoe on the northbound lanes. Peniche said a Chevrolet Silverado struck the Tahoe.

She said a Toyota Corolla and Ford Focus were also struck by debris,

Lewandowski and Littlefield were passengers in the Nissan. The Nissan’s driver and another passenger suffered major injuries and are in critical condition at a hospital, Peniche said.

She said the man driving the Prius and the woman driving the Civic also were injured. The woman was treated at a hospital and released.

Peniche said the Prius’ driver is still in the hospital but she didn’t know his current medical condition.

Anyone with information about the Dodge Charger or its driver is asked to call theEast L.A. CHP office at 323-980-4600.