San Francisco, CA — California is one of three states where people can now get “sex offender movement alerts” sent to their cellphones whenever the sex offender registries in those states are updated.
A Houston-based company called SCAN U-S-A began offering the service Tuesday and it has plans to expand it nationwide.
But critics worry that the alarms may provide a false sense of security.
The databases depend on the willingness of sex offenders to register.
Nearly a quarter of all such offenders nationwide don´t properly inform police about their whereabouts.