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Motive still unclear in Irwindale office shootings

December 17, 2011 | 10:11 am

Investigators are still trying to determine the motive for Friday’s shootings at a Southern California Edison office in Irwindale.

Los Angeles County sheriff’s detectives, who are contracted to investigate homicides in Irwindale, have faced an enormous task, said Steve Whitmore, the Sheriff's Department’s spokesman.

“It's a slow process. There’s a lot of people to interview. Eleven hundred people work there,” Whitmore said. The contact information for all of them had to be logged and the building itself checked.

PHOTOS: Gunman shoots 4 at SoCal Edison office in Irwindale

“It was a long, laborious process. Homicide left the scene at 3 a.m.,” Whitmore said.

In addition, homicide detectives are investigating a deputy-involved shooting in Lincoln Heights on Saturday morning and another in the City of Industry early Friday, Whitmore said.

“It’s been a busy 24 hours" for the homicide bureau, he said.

The Irwindale shooting took place about 1:30 p.m. at an office at 4910 Rivergrade Road when a Southern California Edison worker, Andre Turner of Norco, allegedly opened fire on co-workers, killing two men and critically wounding two other people. Turner committed suicide after the shootings, authorities said.

The dead were identified Saturday morning as Robert Scott Lindsay, 53, of Chino Hills and Henry Serrano, 56, of Walnut.

-- Sam Quinones