Robert Lindsay, 53

Robert Lindsay, a 53-year-old white man, died Friday, Dec. 16, , in the 4900 block of Rivergrade Road in Irwindale, according to Los Angeles County coroner's records.
Lindsay and Robert Serrano, a 56-year-old Latino, were shot and killed when Andre Turner, a 48-year-old black man, opened fire in a Southern California Edison office with a semiautomatic handgun, then took his own life.

Two others, Angela Alvarez, 46, of Glendale, an Edison employee, and Abhay Pimpale, 38, of Montebello, a contract worker, were wounded and in critical condition.

All five worked in Edison's information technology department, Lindsay and Serrano as managers. Los Angeles County sheriff's detectives are still trying to determine a motive for the rampage.

The shooting occurred about 1:30 p.m. at Edison offices just off the 605 Freeway. Turner methodically picked off co-workers, a source told The Times.

"He told some people to leave and he was very deliberate about who he shot," the source said. "He did not like management."

After shooting his co-workers, Turner committed suicide, authorities said.

More than 1,000 people, mostly information technology staffers, work in the offices. Employees need a card key to get into the facility, according to Edison. The gated complex consists of two, two-story buildings and a three-story building where the shooting occurred.

Sheriff's investigators were interviewing many of the workers. "It's a slow process....Eleven hundred people work there," said Steve Whitmore, a sheriff's spokesman.

Lindsay had worked for Edison for 29 years; Serrano for 26. The shooter had been there for seven, said Edison spokesman Steven Conroy.

-- Irfan Khan and Hector Becerra