vonan let mcvicker go but taunted mcvicker by following him. later mcvicker led police to the rag and that's how he was caught. after being sentenced for the rape and then released just 2- 1/2 years later, william vonan kept that promise, kept the promise at least 14 times. starting in 1979 boy after boy after boy picked up near freeways, raped then strangled or stabbed to death. nude bodied found off the freeway. at that time mcvicker didn't know vonan had been paroled. >> all of a sudden i started reading the newspaper and reading about these kid that had been murdered. it all sounded too familiar. it sounded like the same guy. i kept thinking it can't be him he's in jail. >> reporter: eventually mcvicker did tip police, a tip that led to vonan's arrest. >> i am very upset with our system. something has to be done to change. how many times must a pedophile get a chance. >> reporter: while william vonan has been living in san quentin, victim family members have been dying from strokes, alcoholism and suicide. mcvick er is coming to san quentin