you should also check out www.thefiringline.com (use their search feature) and the right-hand sidebar links & article search feature on www.keepandbeararms.com . Reams of data in both places.
I can supply the US parole stats.
ParoleAnd the recidivism rates. Recidivism
I suggest you book mark both and use them on the gun grabbers. They can't dispute the facts..they're gubermint facts!