Marshal Luther "Lute" Houston, and Caddo County Sheriff Frank Smith and his deputy, George Beck.
One of the most senseless killings attributed to Casey was his judging the range and accuracy his new Winchester rifle by shooting a farmer working in his field some 400 yards (370 m) away.
Belonging to Casey's gang at different times were Fred Hudson, Ed Lockett, Joe Mobley, George Moran, Bob Sims, and Pete Williams.
James and Ben Hughes (father and son) also participated with the gang; although opinions differed as to whether they were members or employers.
His body remained unclaimed and he was buried in the Boot Hill section of Summit View Cemetery in the territorial capitol of Guthrie.