First off, the issue would probably get routed to the local police who take these kinds of calls, not the state police who planted it.
This would probably create some paperwork that would frame the event as a crime before it comes to light that the state police were behind the planting. Bring in a good lawyer and you might have a better shot in court over this nonsense.
Regardless, if you're not trained, probably best not to destroy a suspected bomb on your own unless you have no choice.