H.H. Holmes was a serial killer mentioned in Dexter: Resurrection as a part of Leon Prater's collection.
Dr. Herman Webster Mudgett (16 May 1861 – 7 May 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. He was born in Gilmanton, New Hampshire. A graduate of the University of Michigan medical School Class of 1884; until his .execution in 1896 he would choose a career of crime including Insurance fraud, swindling; check forging; 3 to 4 bigamous illegal marriages; murder and horse theft.
Murder Castle[]
In Chicago at the time of the 1893 World's Columbian Exposition, Holmes opened a hotel which he had designed and built for himself specifically with murder in mind, and which was the location of many of his murders. While he confessed to 27 murders, of which nine were confirmed, his actual body count could be as high as from 133 to perhaps 200.
In 1887, he bought an empty lot across the street from the store where he worked and began construction on a three-story building, which he said would be used for apartments and shops.
The structure was ugly and large — containing more than 100 rooms and stretching for an entire block. But Chicago was a city on the rise, and new construction was going up all over this part of the American Midwest.
For his mansion, H. H. Holmes planned for the first floor to contain an entire block of storefronts that he would be able to rent out to the flood of new businesses opening up in the city.
The third floor would contain apartments for new residents looking to make it big in the Windy City. Eerily, some of those unsuspecting residents may have eventually become Holmes’s victims.
Those victims got to see the second floor — one that was allegedly full of “asphyxiation chambers,” mazes, and hidden stairs. And the especially unlucky victims made it down to the basement, which hid the elaborate horrors for which the H. H. Holmes house is now famous.
Throughout the building’s construction, Holmes apparently switched builders and architects frequently, so that no one involved was able to realize the gruesome end goal of all the odd parts.
