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Cause of crash that killed LAPD cop unknown

February 26, 2010 12:00:00 AM PST
Investigators are still trying to figure out what caused a four-car crash that killed an off-duty LAPD officer in Diamond Bar on Thursday.The officer, identified as 37-year-old Jacqueline Montalvo, was heading northbound on Grand Avenue when, for unknown reasons, she swerved across the center divider and head-on into oncoming traffic at about 5:30 p.m.

She slammed into a pickup truck, which then triggered a chain-reaction accident involving two more vehicles. One of those vehicles overturned.

Montalvo was declared dead at the scene. One victim was airlifted to a local hospital in critical condition, and two other victims were hospitalized, but the extent of their injuries is unknown at this time.

The area was shutdown all night as authorities investigated.