can I due if my son was killed at a party on someone property

First of all, I am sorry for your loss.  I would need a LOT more information before being able to determine whether you have a potential claim.  How did he die?  Was it intentional or caused by someone's negligence.  Even if it were merely an act of god, it's possible that it may be covered under the home owner's insurance.  This answer is given in accordance with the laws of Virginia and may not be applicable in any other state.  It should not be construed as legal advice, as that would require a more thorough analysis of all of the facts involved in a specific case.  If you need further information or assistance, please feel free to contact my office for a consultation. Case results depend upon a variety of factors unique to each case. Case results do not guarantee or predict a similar result in any future case.