Snuff film

A "Snuff film" is a type of film, created for either profit or entertainment, which depicts the actual murder of one or more people at the hands of the filmmakers, with the deaths sometimes being preceded by acts such as rape or torture. The term "snuff" is derived from a verb used to describe the extinguishing of a candle flame, and has been used as a slang term for death for centuries. While there have been instances of killers recording their murders, these are often for private use, and the existence of a vast underground network responsible for the creation and distribution of snuff films for profit has long been denied, and is commonly regarded as merely being an urban legend.

Criminal Minds
Various unsubs have recorded their murders with the intention of watching them later to relive the crimes, though other reasons for recording the killings exist; the Canardo's sent DVDs depicting the torture and murder of their victims to the victims' families as a means of psychological torture, while Tobias Hankel would upload footage of himself murdering his victims (recorded using the victims' own hacked webcams) to the internet as a "warning" to others. David Yarno and Becker Chapin attempted to create a film which consisted entirely of murders they had committed, believing that what they were making was a work of art that would lead them to fame and fortune.