Because there are more than 600 registered sex offenders in Potter and Randall counties in the Amarillo, Texas, area, on Halloween parents turned to a smart phone app called "Offender Search."
The app links the Texas Department of Public Safety Sex Offender registry and GPS satellites and lets parents know about any registrants living in a particular neighborhood.
A spokesman with the local police department says that individuals who are no longer on probation or parole are permitted to hand out Halloween candy.
Other free and inexpensive smart phone applications to locate sex offenders are also available.