Jekyll on Trial: Multiple Personality Disorder and Criminal Law

Why do we find multiple personality disorder (MPD) so fascinating? Perhaps because each of us is aware of a dividedness within ourselves: we often feel as if we are one person on the job, another with our families, another with our friends and lovers. We may fantasize that these inner discrepancies will someday break free, that within us lie other personalities - genius, lover, criminal - that will take us over and render us strangers to our very selves. What happens when such a transformation literally occurs, when an alter personality surfaces and commits some heinous deed?