I'll say report him...THE SOONER THE BETTER.

WE found out we had a drug dealer next door just recently. Want to know how we found out?
Someone he pissed off hired two guys to kill him, so they did! Execution style, with his girlfriend and mother watching! Right in his own home, in the evening hours after dinner.

The safe little town where things NEVER happen is getting a little unsafe these days! It's always the LAST people you expect - Now the street I live on has a crime rate. It shook up every old widow within a 20 mile radius. No one leaves their doors unlocked anymore. One little incident like that has changed the neighborhood into a paranoid frenzy!

Do it and save yourself this annoyance. But do it ANONYMOUSLY. :)