New information on what might have killed an inmate that died in Gregg County Sheriff's custody a week ago. The results of a preliminary autopsy have ruled out physical harm as his cause of death.. It was last Saturday that 25 year old Lee Charles Gray was arrested on traffic warrants. While in jail he became ill and later collapsed. Paramedics were unable to revive him. Sheriff's are waiting for toxicology results to see if Gray had ingested some drugs, which may have caused his death. That report will be ready within a couple of weeks.