Yup, you guessed it!
You
You are responsible for "a moving violation" because you were moving and the 'parked car' was stationary.
Irregardless of the day, time of day, the moon cycles, astrological signs, sun spots, acts of deity's, the paranormal, fate, karma, etc...
The person's who parked it there, (its parked illegally.)Not your fault.
If you reverse your car and then collide with a parked car , the person who did the reversing is at fault.
As a general rule, a parked or stopped vehicle is almost never at fault for an accident. The onus is on the driver of the moving vehicle to make sure the way is clear.
Of course it is your fault. The fact that the car was illegally parked is of no consequence. You didn't look where you were backing or you would not have hit the parked car. Would you have hit this car if you had been looking? Perhaps the illegally parked car is a Mini Cooper, parked illegally 1 foot behind a Hummer and therefore not visable when the driver looks before backing up...
The general rule of thumb is that any car moving that hits a parked car is at fault.
If you back into a car you are at fault, especially if the other vehicle was parked. You are the one with the responsibility to look behind you and to avoid the accident. If both cars are moving all bets are off.
It would be your fault, so your insurance company will pay. Unless of course, you have no insurance or you flee then his/her "no-fault" insurance would pay for the damage.
the one that is at fault is the driver that pulls out of their space that then caused both cars to crash . the one at fault should have waited until the other driver parks .
Any time a vehicle hits a parked vehicle or other stationary object, the operator of the moving vehicle is responsible.
From your question I am perceiving that you parked straight and someone came and parked beside you but the rear of their car is blocking the rear of your car. You would be at fault because you should have realized that you wouldn't have been able to back out. In that case you should have contacted the local police (don't call 911) to have them do something with the car if you are not able to find the owner of the vehicle.
If you back into somthing its your fault regardless of whether it was parked improperly or not. You were suposed to be looking
In most states, the driver of the moving vehicle is always at fault when he hits a stationary object, like a parked car. It's ok, you screwed up. We all do it from time to time. Now be responsible and face up to your mistake.