IRWINDALE (CBS) — Authorities have released the 911 call made during last week’s fatal shooting at the Southern California Edison offices in Irwindale.

Listen To The 911 Call

Employees were expected to head back to work Tuesday for the first time since the attack.

Meanwhile, investigators were still trying to establish a motive for the attack. They suspect that financial woes and a alleged reprimand at work may have sparked the shooting last Friday.

The gunman, Andre Turner, came to his work Friday and opened fire on his co-workers, apparently targeting his supervisors. Turner killed 56-year-old Henry Serrano, of Walnut, and 53-year-old Robert Lindsay of Chino, according to Lt. Larry Dietz of the Los Angeles County coroner’s office.

Lindsay had been a manager in the IT division at SCE and worked for the company for 29 years, SCE executives said. He was married and was a father.

Serrano, a manager in the same area, had worked for SCE for 26 years.

Turner apparently was at work Friday morning, but investigators did not know if he left and came back.

Turner allegedly singled out certain co-workers to shoot — including some Edison supervisors — and told other people to leave.

A security guard can be heard describing the attack to an emergency dispatcher:

Operator: What’s going on there?

Caller: There’s gunshots being fired.

Operator: Do you know who’s doing it?

Caller: No ma’am. I’m in the office right now.

The security guard couldn’t see the gunman and thought the shooting was happening in the parking lot outside.

He had no idea the man responsible was a fellow SoCal Edison employee.

Investigators suspect financial trouble may have triggered the attack.

Turner allegedly was having difficulty holding on to his Norco home. He and his wife were reportedly involved in a short sale of the home.

Employees also said Turner had recently reprimanded at work, as recently as the same day of the shooting.

Hundreds of employees gathered Sunday for a vigil outside the building housing SCE’s Irwindale offices as Turner’s widow, Jean, expressed shock and sadness.

“We are in shock and still trying to process this tragic event,” she said.

“Our hearts and prayers go out to all of the victims and their families,” Jean Turner said in a written statement.

SCE has established a $100,000 fund to aid victims and family members affected by Friday’s shooting at the offices housing its Information Technology and Transmission and Distribution divisions. The company also has arranged for grief counselors.

(©2011 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Wire services contributed to this report.)

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