https://morbidology.com/the-hruby-family-murders/

https://www.dailymail.co.uk/news/article-2796703/details-emerge-chilling-moment-money-obsessed-teen-murdered-entire-family-inherit-3-000-going-party-acting-normal-lay-dead-home.html

https://www.truecasefiles.com/2019/04/timeline-case-of-katie-and-steven-pladl.html?m=1

https://en.m.wikipedia.org/wiki/2010%E2%80%932017_Toronto_serial_homicides

https://en.m.wikipedia.org/wiki/Moors_murders

https://criminalminds.fandom.com/wiki/Ian_Brady_and_Myra_Hindley