Day 31 of the Crimetober Series is about the Liske family murders, which occurred on October 31, 2010.


Sources

https://www.brainjet.com/random/1566961/crimes-committed-on-halloween/ 
http://www.sanduskyregister.com/story/201011220001
https://www.wvnstv.com/digital-desk/infamous-halloween-murders/amp/ 
https://www.businessinsider.com/murders-halloween-night-2018-10 
https://alabamabioclean.com/frightening-crimes-that-happen-on-halloween/ 
https://popculturecrime.medium.com/today-in-true-crime-history-october-31-f75c4e3537e0