Investigative Strategies on Top of a Spatio-temporal Database about Sex Offenders

To combat against persistent sex offenders, recent laws call for the use of the GPS technology to monitor their movements. In [1], , it has been proposed the adoption of a Spatio-Temporal DataBase (S-T DB) for archiving this type of complex data, besides traditional ones (i.e., data about their home, (pending) crimes, and sensible areas). In the present paper we discuss investigative strategies that can be easily implemented on top of such a kind of database by taking advantage of the history of the movements of sex offenders. As implementation platform, the SECONDO DB Management System (DBMS) is adopted since it supports a data type about moving objects as well as a reach set of spatio-temporal operators to query such complex data [2].