All you have to do is seal up the attic at night when it's out foraging. Block the hole off with some hardware cloth (wire mesh). Hopefully it doesn't have a nest full of babies, but if it does you should be able to find it by following the trail of shredded insulation and shit.
Or you could pay somebody, I guess.
My folks had an outdoor floodlight that was shorting out a few years back. Farthest corner of the attack from the entrance. I went up there, crawled way into the corner on my stomach to fix it. About halfway through I looked over to the other side and I was nose to nose with a dessicated squirrel skull. It'd chewed the wire, presumably to make a better path to get into the attic through a hole he'd eaten behind the light.
I knew a guy in high school who delighted in running them over. At the time, I thought he was an asshole -- and he was, but I understand why he did it now.