Dan,
Just saw your question regarding the circumstances of Graham Barnett's murder in Rankin. Joe Graham Barnett was my grandfather. First, I would like to say I am interested in any feedback you got from your request. I have just started researching my grandfather's life and any info would be appreicated.
My grandfather was murdered by Sherrif Fowler, I can get his full name, don't have it in front of me know. He was killed with his own machine gun, Fowler had wanted to buy it, but had not paid for it. Graham had given it to him some monthw earlier, before his death, and happened to be in Rankin, and wanted to collect his money. He was having his car serviced at a gas station and as he walked either to or from the car Fowler called his name and gunned him down. Fowler believed Graham was after him for the money, so he would kill him first. That is the shor version as I understand it.
I am curious why you are interested, if you don't mind. I would be happy to share things I have learned thus far.
Sincerely,
John Barnett