Merely serving alcohol at a party will NOT subject the neighbor to liability if your car is damaged by an unknown driver. You will likely never be able to prove that alcohol had ANY relationship to the cause of the accident. The best you can do is file a lawsuit and subpoena the neighbor to be deposed, which would force him/her to appear and answer questions under oath. If the neighbor refuses to appear or answer questions, you may be able to have him/her cited for contempt to enforce the subpoena and, by doing so, may be able to force the neighbor to tell you who was at the party. However, that still doesn't get you much closer to knowing which vehicle/which party guest was responsible for the damage to your car. Without a witness, you can only speculate about which one was responsible. You might be able to find out by hiring an investigator, however, the cost for doing so and the time involved in finding out might be more than it's worth.
Answered on May 21st, 2013 at 11:52 PM