For the Ministry of Justice, we implemented a location tracking system that collects location data for sex offenders on probation in real time, monitors violations at the control center, and allows parole officers to take action against them. The service allows the parole officer to keep track of the location of parolees who wear an electronic anklet in real-time and to prevent recurrence of sex crimes. The system provides a seamless 24/7 service by supporting two central offices and interfacing with multiple control centers.