Alvin Motley, Jr. was shot by a security guard at a Kroger gas station in Memphis on Aug 8.
According to police, the guard and Motley were arguing over the volume of the music from the car Motley was a passenger in before the shooting.
His funeral services were held Wednesday at Freedom Baptist Church in Hillside where Sharpton gave the eulogy.
"Playing loud music is not a death sentence," Rev. Sharpton said. "And to have the excuse that we got into it because of loud music, is an absolute insult to our intelligence."
The guard has been identified as Gregory Livingston. He has been taken into police custody on second-degree murder charges.
Rev. Sharpton also wants Kroger to be held accountable, as cities are when a police officer is the shooter.