Antonio "Mack" Hall was convicted in August of killing Kareem Kelly Guest, who told investigators that Hall liked to "bang the gun" and was connected to several drug-related Baltimore killings. Jurors also found Hall guilty of weapons violations and a seven-year conspiracy to distribute crack cocaine.
A criminal defense attorney leaked information showing that Guest was cooperating with federal investigators. A copy of the document was distributed throughout Westport.
Prosecutors turned Halls' friends into informants during his trial, bringing a girlfriend and a fellow drug dealer into court to testify against him.