Police have a warrant out for a dangerous predatory sex offender who hasn't checked in with his parole officer.  They say Michael Mendibles, 47, has a long rap sheet. He’s been in and out of prison since the mid-80s, for rape and an attack on an elderly couple. Since then he has done time for various crimes, most recently for car theft.  They says he vanished after his release in November. Mendibles is known to frequent inner southeast Portland. He is white, 5’8”, 195 pounds with black hair, hazel eyes and multiple tattoos.