SIOUX FALLS, S.D. (KELO) — A sex offender – convicted rape and having sexual contact – faces new sex charges Friday night.

Federal court documents unsealed this afternoon say 53-year-old Toby Ferguson is charged with having child pornography.

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According to online records, he recently had a hearing to have his parole revoked and is currently back behind bars.

His 1993 crimes involved boys between the ages of 9 and 13.

He was sentenced to 90 years in prison.