James Timothy Mortensen, 58, was arrested by Regional Sex Offender Notification Unit (RSONU) detectives for being a non-compliant sex offender on September 1, 2021 thanks to a Secret Witness tip. Mortensen is a Tier III sex offender previously convicted in Vacaville, California for crimes against children.
RSONU detectives received information from the anonymous Secret Witness tipster that Mortensen was living in Panther Valley; however, Mortensen was not registered at that particular address. During the investigation detectives determined that Mortensen had been living at the residence for more than a month. Detectives made contact and arrested Mortensen for one felony count of being a sex offender who failed to update his address; and for one felony count for being a sex offender who failed his 90 day check-in.
The RSONU was formed in 1998 to be in compliance with federal law passed in 1997. At that time Washoe County, the City of Sparks and the City of Reno all agreed there was a need for coordination in law enforcement in the tracking, monitoring, investigation, public notification, and the arrest and prosecution of non-compliant sex offenders. The RSONU operates as a regional, multi-jurisdictional and collaborative entity to carry out the requirements of community notifications as set forth in Chapter 179D of the Nevada Revised Statutes. The RSONU’s jurisdictional boundaries encompass all of Washoe County, including the Cities of Reno and Sparks.
Currently, there are about 1400 registered sex offenders in the Reno, Sparks and Washoe County area. Each of the three investigators are assigned over 400 offenders to monitor.
The RSONU is open Monday through Friday, 7am to 5pm, excluding holidays, and can be reached at 775-325-6483.
