[CopperKnight]

Another thing that is going to come into play is whether or not your uncle (legal resident) invited this guy inside. I don't know what agreement exists between your dad and uncle or your uncle's capacity, but look at it from the other guy's side. He is invited in. You and your dad arrive (he doesn't know you two) and order him out. He decides to defend his friend (uncle) and himself...

Just something to keep in mind.

 

[CopperKnight]

Ah, got it.

Any possibility of a "restraining" order against this guy? With the history of assault and having to have officers come out to remove him in the past, you should have enough cause to get one. Then he can be arrested any time he even shows up. Would definitely check into that.