I know things I don't want to know.

A true psychopathic killer is nothing like your everyday garden-variety murderer. Not like a holdup guy who panics and unloads his gun into a hapless liquor store clerk, or a man who bursts into his stockbroker's office and blows his head off, and he's not like a husband who strangles his wife over a real or imagined affair.

Psychopaths aren't motivated by love or fear or rage or hatred. They don't feel those emotions.

They don't feel anything at all. Trust me on that one.

Gacy, Bundy, Dahmer, BTK, and the other all-stars in the twisted-killer league were detached, driven by sexual pleasure and the thrill of the kill. If you thought you saw remorse in Ted Bundy's eyes after he'd confessed to killing thirty young women, it was in your own mind, because what distinguishes psychopaths from all other killers is that they don't care at all. Not about their victims' lives. Not about their deaths.

But psychopaths can pretend to care. They mimic human emotion to pass among us and to lure their prey. Closer and closer. And after they've killed, it's on to the next new and better thrill, with no boundaries, no taboos, no holds barred.

I've been told that it's “distracting” to be so consumed by appetite, and so psychopaths screw up.

Sometimes they make a mistake.

You may remember back to the spring of 2008 when the swimsuit model Kim McDaniels was abducted from a sandy beach in Hawaii. No ransom demand was ever made. The local cops were slow, arrogant, and clueless, and there were no witnesses or informants who had any idea who had kidnapped that beautiful and talented young woman.