Would Car Fu be an appropriate response for murder victims in crime media being killed in hit-and-runs, etc?

I feel like there should be "some" trope for that.

Car Fu covers cars being used as a weapon in combat, so a Hit-and-run wouldn't count as Car Fu.

I'm also of the mind that "person is murdered by car" is not a particularly tropeable concept, as it's rather generic. Compare it with something like poison: There's plenty of tropes that cover how poison is shown in fiction, but there isn't a Murder By Poison trope.