The Alcatraz you've never heard of...

The now-abandoned prison on McNeil Island operated for 136 years. Today, McNeil is home to the Special Commitment Center, which houses Washington state's "sexually violent predators." A collaboration between KNKX and the Washington State History Museum, Forgotten Prison tells the stories of inmates, guards and children who grew up on the island. The history of this forgotten place can tell us a lot about how and why we lock people up.