The lead investigator in a Hall County fatal shooting case read to the jury two intercepted letters advising potential witnesses what to tell authorities, according to testimony Wednesday, May 9. Delwoun Quinntess Williams, of Hall County, is on trial for malice murder, felony murder, aggravated assault, terroristic acts, possession of a firearm in the commission of a crime and participation in criminal street gang activity from a September grand jury indictment.