[Bill Douglas]

To add to the previous good advice. DO NOT let them figure out who may have tipped off the police. No police coming to your house for coffee. Seriously; the crazy bastards will shoot you or make you life hell from that point on.

I had the same situation a couple of months ago and did nothing until they had a 24 hour rip roaring party that kept everyone awake all that night so I thought one bad turn deserves another. I visited cops I knew and gave them address decriptions, car regos, times dates, shoes hanging out the windows days they are selling.