Someone probably saw a bunch of young kids enter this house and called the cops. What they did was their job. How were they supposed to know one of your friends parents owned the place? They were just doing their job by making sure no one else other than the owners is inside the house. They did nothing wrong, just their job.

I bet it would be different if some homeless people came to that house, pissed, slept and spray pianted inside that house. I bet he wouldn't have minded so much if the cops came then, right?

I'm just saying they didn't do anything against their own power. There could have been a crazy person who shouldn't be there inside the house, destroying it. They didn't know and they were just doing their job.