Former Police Commissioner Bernard Kerik spoke about prison reform on Wednesday's edition of Inside City Hall.
Kerik went to prison for three years after pleading guilty to corruption charges that included lying to White House.
Kerik said that current practices of sentencing don't serve the public interest.
"If you believe that putting them away for 10 years is a benefit for society, you're wrong, because they're going to get out, and they came out of an educational center that is like none other. They learn how to lie, cheat, steal, con, manipulate, gamble. They learn no respect," Kerik said. "You suck out the societal values, you completely institutionalize them, and then you let them back into society."
Kerik praised current Police Commissioner Bill Bratton, calling him the "architect of crime reduction."
Kerik was an officer when Bratton was commissioner in the '90s.