If you did not already admit that you were driving, do not do so. If you did admit to driving, you have no viable defense to leaving the scene of an accident (the only viable defense I know of is that you needed to leave to get medical treatment, bring someone else for medical treatment, clear debris from the road, etc). You still have a defense to driving while intoxicated. They have no evidence you were intoxicated at the time of the driving, unless you confess to it.
Answered on Aug 29th, 2016 at 4:03 AM