https://charleyproject.org/case/john-lloyd-heflin

https://www.wlbt.com/story/26014905/cold-case-45-years-old-and-now-re-opened/

https://namus.nij.ojp.gov/case/MP19897

https://www.missingsippi.org/john-heflin

http://www.trackmissing.org/Cases/Details?id=152

https://www.doenetwork.org/cases/4724dmms.html

https://www.websleuths.com/forums/threads/ms-john-heflin-24-starkville-21-nov-1968.358734/