I don't know if LA has a felony murder rule or not - if so, the prosecution could choose to pursue that angle.

Kicking her out of the car on a freeway is a Murder I charge. Dropping her off on the sidewalk would be manslaughter at best, unless the State can charge them with her death in the commission (cleanup) of a felony (rape).

The Felony Murder concept is bullshit, anyways. You are responsible for the consequences of your actions, not those of other people.