Most Prolific Serial Killer You’ve Never Heard Of

Ever heard of Dr. Henry Howard Holmes?  Well, he’s thought to be America’s first documented serial killer, with a staggering body count of over 200 victims.  Sure, H. H. Holmes’ killing spree was around the same time as some other pretty horrific serial killers, like Jack the Ripper, but did Jack make himself a murder castle?  H. H. Holmes did.  Here, we take a look at the most prolific serial killer you never heard of, H. H. Holmes.

Had you heard of H. H. Holmes? Tell us what you think of this terrifying serial killer!