Thomas Stevens killed his brother-in-law William Kiser in 1933 and beat and harassed his sister numerous times. So when he escaped Eloise through a kitchen door the police hunted him but didn't think that he was especially dangerous. So maybe he just hated his family. Regardless, I can find nothing concerning Stevens post asylum break so I'm assuming that he was captured and then he slipped off into obscurity. Which is probably a good thing because that crazy stare and smirk suggests that he was probably a little more than just mentally disturbed. One murder under his belt was proof enough of that.