Damn muggles! Yeah you're right, I guess I can't justify obliterating the car with a possibly-alive cop inside it. (Or, at least, this character can't...)
Well, smashing the hood would be sufficient, but toppled trees aren't exactly precise weapons. As for tearing up the tires, fixing that is easy even without spooky ghost magic so I suspect that's really not worth exposing ourselves for...
I'd suggest letting Archer size this dude up, we should find out really quickly if the poison is working.