Parole Moratorium

If anyone out there follows Pennsylvania criminal justice news stories, you're probably aware that we currently have a parole moratorium in our state (i.e., no parole releases are permitted from our state Dept. of Corrections). This was the result of an unfortunate recent situation in which a parolee who had only been out of prison for about a month shot and killed a Philadelphia police officer. This is the latest in a series of cop shootings in Philadelphia. Everybody is asking "what could have been done differently?" and "why did this happen?" We can't probe Mr. Giddings (the parolee in this incident) for answers because he was shot and killed in the subsequent gunfight with the police. Giddings fit the perfect mold for Moffitt's "lifecourse persistent" offender typology though. He had a criminal career that began at age 10 with a strong-arm robbery of a mentally ill person (sounds like Stanley in Shaw's "Jack-Roller" huh?). He most likely was a psychopath. In retrospect, all indications were that he was going to act out violently again. The problem is that these types of individuals are very difficult to identify prospectively. Is there any risk prediction tool for early identification of an individual like this? Is there any correctional treatment program that stands any chance of being effective with such an offender? I'm interested in any thoughts/discussion on this situation, either from a policy perspective or a theoretical perspective.