Map of Wolfern on In 1975, however, Tom Ferguson was placed on probation. While on a work fur – lough program in 1976, he violated probation, and was returned to prison. Remarkably, he was again paroled on June 15, 1977. In June 1986, Tom Ferguson, 34, was arrested in a Chico, California motel and charged with raping a 54-year-old woman. In January 1987, he pleaded guilty to sexual assault and was given the maximum eight year prison sentence. Paroled in 1990, Ferguson was again sent to prison in 1997 for failing to register as a sex offender within the state of California. He was last reported serving six years for the crime at the California Medical Facility in Vacaville. Map of Wolfern 2016.