Recently...
Then...
Robert Hare (Without Conscience) says that psychopaths leave trails of destruction and ruined and shattered lives in their wake. In this guys (Bernardo's) case, you've got a couple dozen rape victims, at least three and probvably more like a half dozen dead bodies, one guy (Baltovich) having sat in prison for nearly a decade for something he clearly knows nothing about, and this 35 yerar old just now getting out of slam after 12 years for things she most likely did while brainwashed.
Hare says that psychopaths are born and not made, that there's no cure, that it's real obvious at a very early age, and that virtually all parents of psychopathic children would be happy to hand them over to government agencies to be put on some island at age six or eight.
Looking at the carnage from this particular story, I'd just about be happy to see psychopaths brand with a capital P on their foreheads at age ten so that the rest of can have an easier time avoiding them.