Did a convicted hitman take out mob boss Whitey Bulger? Freddy Geas has been named as one of four inmates who beat Bulger to death in his prison cell with a padlock inside a sock, according to a published report. The beating was so savage, 89-year-old Bulger was unrecognizable when his body was found. It's believed he had a target on his back because he had been exposed as an FBI informant. "Freddy hated rats," one source told The Boston Globe. Geas is serving life for a gangland slaying.