To catch a vandal

Over the last six months or so we have had someone vandalizing our mailbox. A couple of times there has been an egg in it. Then a few days ago a clump of grass and dirt. No huge deal, I usually just clean it out and go on my way. But yesterday they uprooted a bush by the mailbox and shoved it in the mailbox. So last night I set up a web camera pointing at the mailbox.

So now we wait...