Leaving the scene of an accident is a crime that in some states can land you in jail.
It depends on how severe the accident was and if anyone was hurt or died in the car accident.
If nobody was hurt in the car accident then most times you'll just get a ticket when they find you, but if someone died then expect to get arrested for fleeing the accident.
Always stay after the accident and report the accident to the police. It's not only the legal thing to do it's also the right thing to do.