There may be 3,500 psychopaths behind bars in Canada’s prisons, roughly one quarter the male penitentiary population, according to researchers. They are conscienceless predators and manipulators driven only by a desire for self-gratification. Until recently, Don Gazley (inset) was among them. Gazley (listen to him, after the jump, in manipulation mode, in Episode 4 of the Cancrime podcast) has a two-decade history of sex crimes and involvement in a murder. He’s been diagnosed a “classic psychopath” who poses a high risk to commit new sex crimes. Yet Gazley was released in early January from a penitentiary in British Columbia, in part, because the top legal official in Ontario, where he was last sentenced, chose not to seek to keep him locked up forever through a dangerous offender designation. Gazley’s treatment by the criminal justice system isn’t unusual. A Canadian expert on psychopaths, forensic psychologist Stephen Porter, says the system must take psychopathy “much more seriously.” His research reveals that, although psychopathy is one of the most powerful predictors of criminal recidivism, psychopaths win conditional release 2.5 times more often than non psychopaths.