All four members of The Thrasher Family were found murdered in their home in Woodward, Oklahoma. The person who was eventually convicted of the murders had no obvious motive for this senseless murder.
Sources:
1) https://law.justia.com/cases/oklahoma/court-of-appeals-criminal/1977/1068.html
2) https://www.oklahomahistory.net/ttphotos12a/ThrasherMurders1974.txt
www.finndagrave.com
3) https://www.woodwardnews.net/news/local_news/collins-up-for-parole/article_c0c4519f-786c-537a-83ff-0fd23da42381.html
4) https://www.oklahoman.com/story/news/1992/07/25/board-denies-parole-for-two-in-70s-slayings/62486871007/
5) http://www.usgennet.org/usa/ok/county/ellis/obits/brown-dorothyl.htm
6) https://okoffender.doc.ok.gov/
7) https://en.wikipedia.org/wiki/Woodward,_Oklahoma
8) https://stephenjoneslaw.com/