6- Ronald Clark O'Byran, Boogeyman of Halloween

8 - Shawn Michael Grate

Shawn Grate [https://en.wikipedia.org/wiki/Shawn_Grate] from the Book of Knowledge Murder Statistics for Shawn Grate [https://serialdispatches.com/alphabetical-list-of-serial-killers/list-of-serial-killers-g/grate-shawn-michael/#statistics] THE STATE OF OHIO, APPELLEE v. GRATE, APPELLANT. [https://www.supremecourt.ohio.gov/rod/docs/pdf/0/2020/2020-Ohio-5584.pdf] Grate enters insanity plea in murder case [https://www.ashlandsource.com/2016/12/28/grate-enters-insanity-plea-in-murder-case/]

7 - Kendall Francois

Kendall Francois [https://maamodt.asp.radford.edu/Psyc%20405/serial%20killers/Francois,%20Kendall.pdf]

6- Ronald Clark O'Byran, Boogeyman of Halloween

Ronald Clark O'Bryan [https://en.wikipedia.org/wiki/Ronald_Clark_O%27Bryan]

5 - Volker Eckert

Volker Eckert was a German serial killer who killed six women in East Germany, France and Spain, between 1974 and 2006.

4 - Jeffery Dalmer

Jeffrey Dahmer was an American serial killer and sex offender who committed the murder and dismemberment of seventeen men and boys characterized by necrophilia and cannibalism between 1978 and 1991.