Yeah, it looks like a vole, I've never heard of them going into human dwellings though. We have them in the woods around my mom's house, or at least the cats will kill one occasionally and eat it on the porch.
As far as I know they're harmless, just let it go in a nice field or wooded area someplace.
Well I am shocked to hear it is a vole. Heres why: I have been seeing it out of the corner of my eye many nights for several weeks now, and it pulls a Houdini act. It used to activatedthe motion sensor light at night sometimes and has went in and out of the house often. I put the trap out for a reason: to catch this particular animal where I often see it. There are thousands of vole tunnels on all the properties but I did not think they prefered human dwellings. I froze it on parent orders, sorry all.
I caught one one time when I was a kid but it fell off of my pool table and busted its hind legs and died a few days later. All it ever wanted to do was bite me anyways. Killing it won't affect the wild population any so don't sweat it.