Got a brick through my window last night...

Apparently my son whom I kicked out a few weeks ago,owes someone money. Time for Cameras and GUNS. Any suggestions.....

I have 7 video cameras on my property. Got video of two locals stealing items from our yard late last fall & turned it over to local police. The 2 guys faces are clearly shown on the video. I even know where one works & have the tag number of the car they left in. Nothing was done about it. Invest in guns.