Aly Vander Hayden

Though the reasons behind his killing spree have never been illuminated, many have speculated whether or not Cunanan personally knew Versace.

“It was almost as if they were turned on by the violence," a reporter told "Killer Couples."

From "Dirty John" to "S-Town," 2017 gave us a ton of binge-worthy true crime podcasts.

One police officer called the crime scene "apocalyptic."

Timothy Sheline, who was profiled on "Cold Justice" in 2015, was convicted of murdering Gwendolyn Bewley. Season 5 of the show premieres August 4.

From human sacrifices to deadly acts of sexual sadism, check out the deadliest pairs from Oxygen's "Killer Couples."

Police found the remains of 11 different victims. Watch "Dahmer on Dahmer: A Serial Killer Speaks" on Oxygen.