you are likely both at fault.
If you hit a legally parked car, you are at fault.
If you are parked illegally and someone hits you, it is usually your fault.
If someone is injured in your parking lot accident, you must report it to the police.
If your accident causes $2,000 or more in combined damage (vehicles and property) then it must be reported.
You cannot drive intoxicated by drugs or alcohol.
Leaving the scene of an accident without giving your personal information can lead to criminal charges.