Sinister Crossovers
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Cycle of Evil by breather89
(Originally published on ArchiveOfOurOwn) After the Collins' house is burnt, Zach and Clint are dead and Deputy So-and-so is missing, the BAU go to investigate the possible serial killer, based on evidence the deputy left behind. But when they find several reels, detailing all of the family murders in the last fifty years, the agents seem to be going in too deep.
Crossover - Criminal Minds & Sinister - Rated: T - English - Horror/Family - Chapters: 1 - Words: 16,723 - Favs: 8 - Follows: 3 - Published: 11/23/2019 - A. Hotchner/Hotch, Jennifer J./JJ, S. Reid - Complete
What is this? Children of the Corn? by Waitinginadream reviews
Dean and Sam Winchester are accustomed to the extraordinary. However, the brothers are stumped when Sam comes across a series of horrifying "family videos" that depict unusual and gruesome ways the families were murdered - by their own children. The phenomenon is spreading from state to state, can they stop it?
Crossover - Supernatural & Sinister - Rated: M - English - Supernatural/Horror - Chapters: 1 - Words: 193 - Reviews: 1 - Favs: 4 - Follows: 1 - Published: 8/5/2017
something sinister this way comes by withintemptation1992 reviews
au,after Stephanie disappeared the dursleys moved into that house, seven year old harry disappeared and the dursleys found slaughtered now a recently free Sirius teams up with deputy so and so to find out what happened and get his godson back.
Crossover - Harry Potter & Sinister - Rated: T - English - Horror/Family - Chapters: 1 - Words: 295 - Reviews: 9 - Favs: 16 - Follows: 19 - Published: 1/13/2016 - Harry P., Sirius B., Remus L., Albus D.