Criminal Profiling and Technology

"Many law enforcement agencies now use computerized systems to aid them in such investigations; the FBI’s Violent Criminal Apprehension Program (ViCAP), for example, is a database that contains information on violent crimes committed across the United States. The system compares all new cases with all previously entered cases; when two cases are similar enough to have been committed by the same offender, the system alerts the appropriate law enforcement agency."

http://www.britannica.com/EBchecked/topic/467289/police/260959/Criminal-profiling