In cities including Philadelphia and Baltimore, high-tech software helps determine which parolees are most likely to kill and what level of supervision makes sense.
The crime-prediction computer program was developed by Richard A. Berk, a criminology and statistics professor at The University of Pennsylvania.
"It's saved a lot of money, and resources for those at low risk have been moved to those at higher risk," Berk said. "Human behavior is complicated, and although parole boards might make the best decisions, there is inevitably going to be a mistake."
The software, which makes forecasts based on geographic location, age, type of crime and other variables, is helping parole boards and law enforcement keep closer watch on the most violent offenders.
In Baltimore, where the system is being used to help determine parolee and probation supervision levels, a test of the program on offenders from 2006 had a 75 percent rate in identifying who would kill and be killed, Berk said.
The program doesn't predict whether parolees will commit other crimes. "It's hardly perfect, but we're doing much better than the current seat-of-your-pants forecasting," Berk said.
Pennsylvania is expected to apply the software for all parolees by the end of the year.
Other states have found success moving away from parole-officer discretion to more restrictive supervision and rapid-reaction punishment.
A model program in Washington state dishes out swift and predictable consequences for parolees who mess up, according to Mark Kleiman, a professor at the University of California, Los Angeles.
