In case there is anyone out there who still thinks GPS monitoring is a magic solution, consider this article by Alex Cantatore for the Turlock City News:

A Fresno man who was convicted for sodomizing two infants is now at large, and may be in Stanislaus County.

The California Department of Corrections issued a warrant for the offender, Kenneth Lawson, on April 16. He was released on GPS-monitored parole, but is believed to have cut off his GPS tracking ankle bracelet.