I'm going to hide my friends car to prevent him from driving under the influence
Why would you hide his car?
I don't want him to get into a car accident and get hurt.
Thats a good idea to stop them from doing something like that. It could hurt them, someone else, or they could get a ticket.
I want him to get a DUI ticket and I'm thinking of calling the police.
Well you shouldn't let him drive at all right? You should just look after him and stop him from getting behind the wheel.