The Natrona County Sheriff's Office is asking for the public's help in finding a convicted sex offender who reportedly failed to update his sex offender registration.

Francisco Ortiz, 51, is described as a hispanic male standing 5'8" tall and weighing 146 pounds. He has black hair and brown eyes.

Ortiz was last known to be living in the 200 block of North Park Street in Casper.

According to information listed on the sex offender registry, Ortiz was convicted in 1989 of sexual abuse of a minor. The charge specified that the victim was less than 16 years of age, while Ortiz was at least four years older -- he would have been 23 at the time.

Anyone with information on the whereabouts of Ortiz is asked to call the Natrona County Sheriff's Office at 235-9282.

Tips can also be submitted online at, or via the TipSubmit mobile app.