https://www.prairieghosts.com/capone.html

https://en.wikipedia.org/wiki/Albert_Fish

Sources:

Edward Shue
https://en.wikipedia.org/wiki/Greenbrier_Ghost
https://www.cracked.com/article_25237_6-ghosts-who-solved-their-own-murders.html

William Corder
https://en.wikipedia.org/wiki/Red_Barn_Murder

Allan Showery
https://unsolvedmysteries.fandom.com/wiki/Teresita_Basa

Adrian Daou
http://www.ottawasun.com/2015/11/16/bizarre-axe-killing-confession-tapes-stuns-adrian-daous-murder-trial
https://ottawacitizen.com/news/local-news/jennifer-stewart-verdict

Jose Ferreira
https://www.huffingtonpost.co.uk/entry/jose-ferreira-carrie-ann-jopek_n_56254f64e4b0bce34701b57e?guccounter=1

Billy Schmidt
https://www.inverse.com/article/32404-the-keepers-who-is-brother-bob-netflix-documentary

Al Capone
https://en.wikipedia.org/wiki/Al_Capone
http://omgfacts.com/al-capone-was-haunted-by-the-ghost-of-a-man-he-killed/

Albert Fish
http://www.theparanormalguide.com/blog/albert-fish-the-gray-man
https://en.wikipedia.org/wiki/Albert_Fish

Terry Childs
https://www.sfgate.com/news/article/Serial-killer-admits-to-unsolved-murders-in-Aptos-11063911.php

Lee Harvey Oswald
https://www.therichest.com/shocking/15-haunting-crimes-cases-that-could-be-paranormal-activity/