thesis in criminology, a program he calls rigel. rosmo designed the program after studying the relationship between hundreds of crimes and where the perpetrators lived in relation to the crimes they committed. >> then the computer assesses distances between the various crime sites and distances from the crime sites to what is really a 40,000 pixel grid covering the area where what we call the hunting area where the crimes have taken place. for each of those 40,000 pixels it will assign a probability value. representing the likelihood that's where the perpetrator lives. >> when detective rosmo entered the locations of the 12 rape cases in lafayette, the computer identified something important. it was a specific neighborhood just two miles from each of the crime scenes. according to the computer, this one-half square mile area was the neighborhood in which the perpetrator either lived or worked. surprisingly, a deputy sheriff from lafayette lived in that very neighborhood at the time the assaults took place, although he had recently m