A man incarcerated in the Hall County jail allegedly slammed his cellmate’s head against the concrete floor, killing him, according to warrants. John Darrell Setchel, 24, of Dawsonville has been charged with murdering his cellmate Ronald Sailers, 72, on Sunday morning. Sailers was discovered dead in his cell around 6 a.m. Sailers had been in jail since Sept. 16 on a Superior Court arrest order from an aggravated assault charge, according to booking reports.