John Wayne Gacy murdered 33 males, most of whom he buried in the crawl space beneath his home.

From the 1970s to the '90s, Dennis Rader lives as a serial killer in Wichita, KS.

Aileen Wuornos gained national attention after she was charged for murdering at least six men.

In 2002, for three weeks, Lee Boyd Malvo and John Muhammad hunt random D.C. residents with a rifle.

Karla Homolka and her husband, Paul Bernardo, drugged, raped and murdered three teens.

Before he goes to trial, Danny Rolling unexpectedly pleads guilty to five disturbing murders.