One of the problems with studies that examine the effects of violent imagery is that they typically use mentally healthy psychology students. If you want to do a meaningful study, show movies like Body Double and Copycat to a group of sexual psychopaths the day before you release them.

Celebrity stalkers also are not necessarily fixated on one person as the public thinks. Rather, they tend to switch targets, going from, say, an athlete to an actor to a politician.

Our job should be like any other forensic scientist's - we should be truth seekers who are not partisan, who do not have any interest in the outcome, who call it as we see it no matter the consequences. But it seems a lot easier for chemists and anthropologists and pathologists to take that neutral role than it does for psychiatrists.

Only the individual can decide what level of risk she can tolerate and what level of freedom she's willing to sacrifice for the sake of safety.

With rare exceptions, people are responsible for what they do.

One of the problems with studies that examine the effects of violent imagery is that they typically use mentally healthy psychology students. If you want to do a meaningful study, show movies like Body Double and Copycat to a group of sexual psychopaths the day before you release them.

We've had 20 years of mass murders throughout which I have repeatedly told CNN and our other media, if you don't want to propagate more mass murders, don't start the story with sirens blaring. Don't have photographs of the killer. Don't make this 24/7 coverage. Do everything you can not to make the body count the lead story, not to make the killer some kind of anti-hero. Do localize the story to the affected community and make it as boring as possible in every other market. Because every time we have intense saturation coverage of a mass murder, we expect to see one or two more within a week.