Most Evil (2006)

Episode Overview

Over 90 percent of homicides are perpetrated by men. However, what drives women to commit murder? Typically, female killers target those they know best, such as Mary Beth Tinning, who confessed to smothering at least a few of her nine children who died under her watch. A neurologist examining brain structure has discovered significant differences in a specific region of the brain between genders. Could this be a key factor in understanding their contrasting tendencies toward violence?