It’s a sordid true crime tale that has few peers. By 1893, the year of the Chicago World’s Fair, a man named H.H. Holmes had converted a sprawling property into an amusement house of murder, filled with secret passages, gas chambers, ovens, and the bodies of young women who made the mistake of booking a room.

Holmes eventually confessed to over two dozen murders and was sentenced to death by hanging in 1896. His body was tossed into a plot at Holy Cross Cemetery near Philadelphia. But ever since then, there has been speculation that Holmes somehow cheated death and may not have been buried there at all. Those rumors can now officially be laid to rest as researchers have confirmed that the remains buried at Holmes's gravesite do in fact belong to the serial killer, according to the AP.

In May, NBC Chicago 5 reported that two of Holmes’s great-grandchildren had persuaded a Pennsylvania court to allow the inspection of their relative’s body in the hope that DNA testing would settle the issue of whether Holmes faked his own death once and for all.

According to newspaper accounts of the era, Holmes requested that his coffin be laid over cement, then topped off with more of the same. That led to a belief that Holmes had somehow eluded his appointment with the noose by offering bribes to law enforcement and had his tomb sealed to prevent any investigation into the matter. Other accounts, including one from the Chicago Tribune on May 8, 1896, appeared certain it was Holmes (real name: Herman Webster Mudgett) who was hung by his neck.

The definitive answer came with assistance from the University of Pennsylvania's Anthropology Department, which agreed to assist Holmes's descendants. The results of that testing were confirmed earlier this week on the series finale of American Ripper, a History Channel series that documented the exhumation and the scientists' search for the truth.

University of Pennsylvania anthropologist Samantha Cox, who was part of the team, said it was a difficult job. Even though his body had decomposed, because of Holmes's very specific burial requests, his clothes were almost perfectly intact, as was his ever-present mustache.

“It stank,” Cox said. “Once it gets to that point we can’t do anything with it. We can’t test it, can’t get any DNA out of it.” Instead, Cox and her colleagues had to use Holmes's teeth to identify him.

[h/t AP]