Was a Hungarian countess the world's most prolific serial killer?
Submitted: Apr 10, 2008 - Elizabeth Bathory was never convicted of her crimes, but testimonies say she killed as many as 650 people. Did she really bathe in their blood? And how did her family bring her rampage to an end?
Serial killers tend to be men by an overwhelming margin. In fact, there's no definitive profile for female serial killers [source: LSU]. But if history and evidential testimony are correct, a woman is…

