If the homeowner is convicted...his friend (if this person is who he says he is) could be called during the sentencing phase. All I see is a person pointing at freepers as if they are glad the boy got shot. It's Sickening. My apologies if I've offended anyone.
Now you're getting smart. In this or any other discussion site the second somebody says "gee whiz guys I was there" or "I've talked to one of the witnesses", it's best to lay off of them lest you become part of the case.
We had some cases in the federal courts in DC during the Clinton years where drug gang enforcers would show up to just stand in the corridors and intimidate people planning on testifying.
They had others inside the courtroom reviewing witness statements. They ended up killing some poeople. After that the courts really cracked down on this business of witness intimidation. Although these new practices may not have come to your area as yet, they are in place here.