Oscar James ROUNDTREE was a former Texas Ranger and at the time of his death he was a Cameron County deputy sheriff. He was shot to death by millionaire landowner D.B. CHAPIN in a saloon in San Antonio. His father was J.O. ROUNDTREE of Blanco (also reported as Jim Wells co) and his mother was Avis Martin of Texas. He was buried in Texas but death certificate unreadable on location. Any assistance would be appreciated.