The Brief An Atlanta man received 15 years in federal prison for selling fentanyl while carrying a fully automatic machine gun. Ballistics testing later linked the converted automatic firearm to an earlier drive-by shooting in East Point. Federal officials sentenced a 28-year-old repeat offender to 15 years in federal prison for trafficking fentanyl while carrying an illegal machinegun in Atlanta. Officers found an illegally converted automatic pistol in Pierce's pants pocket, along with 469 fentanyl pills, oxycodone, methamphetamine, and $10,020 in cash inside and near the car. Unanswered details in firearm caseWhat we don't know:Officials have not publicly disclosed who fired the automatic weapon during the East Point drive-by shooting prior to Pierce's arrest.