Ten Haunting Documentaries That Are Stranger Than Fiction

Mugshot of Albert Fish, 1903

Documentary film is my favorite genre, and the linked list of ten documentary films compiled by mental_floss writer Sarah Watt ranges from unsettling to positively horrifying. I've seen all of these films and I found the most disturbing on the list by far to be the 2007 film Albert Fish: In Sin He Found Salvation. Based on the life of deranged serial killer and cannibal Albert Fish, the video is only for those interested in true crime and aren't "faint of heart," as the saying goes. The film incorporates graphic, repulsive confessions from Fish, vintage clips and photographs as well as creepy reenactments. Even the narrator sounds sinister.
Other seriously disturbing runner-ups on the list include Dear Zachary (2008), a frightening story of murder and madness, and the 2011 HBO documentary There's Something Wrong With Aunt Diane, about the mystery surrounding what prompted a usually responsible, accomplished woman to carelessly cause the deaths of six people, four of whom were children from her own family.
Read more about the ten haunting documentaries on this list at mental_floss. But beware: it's likely that you won't soon (or ever) forget some of these stories.