Workplace Violence
Sgt. Phillip Martin was shot and wounded after a gunman went on a rampage, killing three coworkers last week
The gunman, an employee himself, died from a self-inflicted gunshot wound, police said
The suspect was also shot and taken into custody
Investigators do not believe Nasim Aghdam specifically targeted the three victims wounded in the shooting
Jimmy Lam appeared to single out the three slain drivers but investigators have yet to determine a motive
The FBI is also investigating the case, given the suspect’s interest in beheadings and a recent surge in Middle East violence