A small block of C4 with a pressure release switch and a couple of inches of det cord should do it. You'll need to do some DNA tests to find out who it was, but I'm sure the word will get out. I have a friend that has a construction outfit and on occasion a valuable piece of his equipment would get lost from the job site. He had a tracking system installed on high value items like compressors, backhoe and trailers. I think he called it Lojak. One nice fellow decided he needed Rick's compressor more the he did and borrowed the unit. Seems the gentleman liked to do this on a regular basis in a 3 state area and sell the units out of state. These fine people from Lojak tracked him down before he pulled into his driveway. Don't know what it costs, but it won't mess up your favorite tree as the C4 will.
Semper-Fi....