Day 30 of the Crimetober Series is about the murder of Martha Moxley, which occurred on October 30, 1975.



Sources

https://en.m.wikipedia.org/wiki/Murder_of_Martha_Moxley 
https://www.cbsnews.com/news/who-killed-martha-moxley/ 
https://www.oxygen.com/murder-and-justice-the-case-of-martha-moxley 
https://marthamoxley.com/ 
https://www.nytimes.com/topic/person/martha-moxley "Moxley Case: Who is Michael Skakel?". cnn.com. December 31, 2007. Archived from the original on August 10, 2014.