Did a countess really give all her money to a dog? Did she even exist, or was she a creation of Maurizio Mian? These are the questions at the center of Netflix's docuseries "Gunther's Millions."
From the Hillside Strangler serial killings to the Sally McNeil case, many of these documentaries take another look at the cultural influences — and shortcomings — surrounding the crimes.
Director Jessica Dimmock told Oxygen.com that she wanted to create a "letter of appreciation" to the families of victims who were found in the Texas "Killing Fields."
Investigators Tim Braun and Danny Baldwin famously recruited nurse Amy Loughren to help them look into serial killer Charles Cullen after hospitals reported multiple suspicious deaths.
"Killer Sally" director Nanette Burstein reexamines Sally McNeil's 1995 killing of her fellow bodybuilder husband Ray McNeil, who allegedly abused the former Marine.