I've been looking at these pictures for several days now, and I don't think it's a bear--mangy or not.
(However, I do have to admit that I have never seen a bear nekkid, so it could be one.)
I think it looks like someone was keeping some type of monkey/gorilla/orangutan as a pet, it got too big, and they just turned it loose! It happens with gators, exotic fish, and (gulp) snakes all the time. I can't imagine how it hooked up with bears though, that confuses me.
I don't go for the sasquatch angle because none of them have ever been hit on the road. Maybe that sounds stupid, but I have seen everything dead alongside the road. One year while we were on vacation, we passed a dead carcass, and I thought WTH for about 2 miles. Then I spoke up: "Did anyone else see a dead monkey by the side of the road about 2 miles back?" My parents just howled with laughter because they'd both seen it too, but had thought they were losing it!