RE: Neighbor Problems...
I think you can talk til you're blue in the face. Heck there wasn't even a response to your Father's going over there so I think you have to move to the next step.
I imagine when you call the cops, by the time they get there he ain't gonna be standing there still shooting so, because I see this becoming a he said/he said thing............
get the video camera rolling on EP and just keep taping and taping and taping. Eventually he'll do his part, maybe when you're not even home.
Thesedays. that is how most folks get caught doing things they shouldn't be doing - video.