The recent indictment of a former Hall County Sheriff’s Office deputy has raised questions about the future of cases in which he was involved. David M. Treadwell, 33, of Gainesville, was charged in a seven-count indictment on Jan. 28 involving accusations he took payments from someone he believed to be a drug dealer with the understanding he would tell the dealer if the sheriff’s office was investigating him. Treadwell, who had worked with the sheriff’s office since 2007 and held the title of investigator, was fired two days after the indictment.