Martha was 15 years old at the time of her murder in 1975 Greenwich, CT. Martha was found in her yard, beaten and stabbed to death on Halloween Day with a golf club. A club that would later be linked to a neighbor family with 2 teenage boys, Thomas and Michael Skakel, cousins to the Kennedy family. Despite evidence supporting Martha's involvement with the boys and the club linking the younger son, Michael, to the murder, no one would stand trial for 25 years.

Sources:

http://cache.boston.com/globe/magazine/2000/6-4/featurestory1.shtml

https://www.oxygen.com/murder-and-justice-the-case-of-martha-moxley/crime-time/martha-moxley-diary-skakel-family

https://www.courant.com/news/connecticut/hc-skakelfamily.artjun09-story.html

https://www.oxygen.com/murder-and-justice-the-case-of-martha-moxley/crime-time/martha-moxley-diary-skakel-family

https://www.oxygen.com/murder-and-justice-the-case-of-martha-moxley/crime-time/michael-skakel-memoir-martha-moxley

https://www.cbsnews.com/news/the-one-man-grand-jury/#:~:text=Under%20state%20law%2C%20a%20prosecutor,other%20investigative%20procedures%20have%20failed.

https://allthatsinteresting.com/martha-moxley

https://apnews.com/c954f8ddce0d4bb6b79e85e6f398f378

https://en.wikipedia.org/wiki/Murder_of_Martha_Moxley#In_popular_culture

https://www.zillow.com/greenwich-ct/