This is very sad indeed, What is it that can drive a monk to do such an act? Surely the karma for that cannot be good, in fact, from what I've read, this can only lead to a lower realm. I wonder what kind of karma can bring him to this and he was staying at the Nechung guesthouse at that. So, very sad that the monks at the monastery could not help in any way.
It's very disturbing to see any death, much less a suicide and a suicide of a monk at that!!!