I am trying to find a case against Harold E. Casety in 1979 in the shooting of Patricia, how can I do that?

I have been trying to find this on the internet. I know that this happened, and now I have a case against the same man in the state of PA. It does not involve a shooting, but he was found in my home with possession of a loaded fire arm! How do I go about looking this up on here? I really want to know! He has been arrested in PA because I have had a PFA put on him. Please contact me on this matter, it is very important to me! The shooting took place in 1979 in L.A. California!