A month ago, maybe, I saw a bunch of these feasting on a chipmunk carcass from my cats. Today, I saw one hanging out in my garage, so I tried my best to snap a few pictures of it. Its body is about the size of a dime, and it doesn't seem like a threatening beetle. Nonetheless, I've never seen one around here. I was chasing it with my Blackberry camera, so the pictures aren't the best:
The light colored patch with the spot in the middle is actually yellow, which my camera didn't seem to pick up too well.