Melissa Hayes-Spencer died Monday when she drove her Honda Civic off the road while trying to get onto State Route 125 from State Route 94. The San Diego County Medical Examiner's Officer identified the 30-year-old officer as the victim Wednesday.
California Highway Patrol officials said she made an unsafe turning movement to the left at a "very high rate of speed" as she tried to make the exit. Her car flew down an embankment and hit a tree, killing Hayes-Spencer. She was not wearing a seat belt at the time.
In October, Hayes-Spencer was temporarily arrested on suspicion of first-degree murder, accused of shooting her boyfriend Rayshaun Cole, 30, to death.
On Oct. 17, Cole was found with a single gunshot wound to his chest in the Pinnacle Apartment complex in Chula Vista. Police said Hayes-Spencer and Cole had been living in the apartment together for just over a month.
The San Diego County District Attorney's Office decided not to file charges against her, and Hayes-Spencer was soon released.
At the time of the crash, CBP officials said Wednesday, she was on administrative leave from her position.