I didn't know that was you, but also, i don't truly know you as you are but an online avatar with a crafted online persona (as are we all). But to answer your question, definitely plausible that anyone could be viewed by their friends and peers as a stand up guy yet commit crimes that no one would ever suspect them of (and to clarify, i'm not accusing you of any wrongdoing, i know absolutely nothing about you or that it was even "you", my comment was just a generalized recollection about someone finding 1000's of arrowheads in the same area).
In just 11 years in Law Enforcement, i arrested a Medical Research Doctor from the Mayo Clinic, stealing of all things, kids toys. I arrested a prostitute, who's mother turned out to be the assistant county attorney. I arrested two high school teachers who were not only lovers and taught at the same school, but were running a theft ring that boosted goods from retail stores and sold them on ebay. I arrested a meth head who used to be a Emergency room registered nurse, with a house, two kids and husband, she lost them all when she became addicted to meth. So, yes, in my experience, you never truly know people and anyone is capable of most anything.