H. H. Holmes Herman Webster Mudgett ( May 16 , 1861 -- May 7 , 1896 ) , better known under the name of Dr. Henry Howard Holmes or just H. H. Holmes , was one of the first documented serial killers in the modern sense of the term .
H. H. Holmes Herman Webster Mudgett ( May 16 , 1861 -- May 7 , 1896 ) , better known under the name of Dr. Henry Howard Holmes , was one of the first documented serial killers in the modern sense of the term .