Police say a former Rikers Island inmate managed to sneak back into the prison repeatedly by impersonating a corrections official. Matthew Matagrano, 36, allegedly used the badge and ID of the official for at least a week to get back inside and mingle with inmates before his arrest yesterday, reports AP. Why? That part isn't clear. It may or may not be relevant that Matagrano is a registered sex offender. He pulled a similar stunt in 2004 when he used a fake ID to enter a Queens school and pore over student records, reports the New York Post.