John Arthur Volker: In two separate incidents in 1991 and 1995, he had sexual contact with a 3-year-old female and a 9-year-old female. Both victims came forward about the incidents in 1998. He received seven years probation in 1999 and was required to register for life as a sex offender. At the time of his 1999 conviction, he was living in Humble, Texas, but moved a month later to Houston, where he failed to register. In 2000, the Harris County Sheriff's Office issued three warrants for his arrest for two counts of Indecency with a Child and one count of Failure to Register as a Sex Offender. In 1999, VOLKER had been working as a Restoration Technician and is not known to have held any employment since then.