A passerby made the discovery just after Sunday at the parking structure at an condo complex in the 2100 block of Scholarship.
Officers found a man and a woman shot to death inside a white Kia, which was parked on the top floor of the structure.
The victims have been identified as Keith Lawrence, 27, and his fiancée, 28-year-old Monica Quan. Police said they lived at the complex.
Investigators don’t have a motive for the killings. Police said it does not appear that the couple was robbed.
No witnesses have come forward, and no one reported hearing gunshots.
Read more at KTLA