A few years ago, someone conducted a paranormal investigation at the old, original Michigan State prison in Jackson, later used as an armory.

Click the video and see some eerie pictures as well as hear some audio EVP's (Electronic Voice Phenomenon) with subtitles so you can make out what these 'spirits' are possibly saying.

I've visited that prison in the underground tunnels and solitary confinement room and it's definitely one creepy place...perfect fodder this Halloween season!