Hopefully all the mountains in the area get together and they all trespass this kid from their hills.
Get a written trespass order prohibiting him from being anywhere on their property (hill, parking lot, stores, etc)
I do not feel bad for this kid 1 bit. He could have been caught stealing YOUR snowboard. He stole someone's and it could easily happen to you.
He has probably stolen many board and just got caught this time.
There are probably many board stolen and sold by this kids and his friends.