Police say Marcus Longus was arrested on drug and firearm charges after police pulled him over.
He initially gave police a false name.
Longus was charged with the fatal shooting of Antonio Joyner at a party on Guilford Avenue in Hagerstown in June. Joyner died from a single gunshot to his chest.
Longus is still in Baltimore. According to Lieutenant Thomas Langston, it isn't clear when he will return to Washington County.
"Friday night, Saturday morning he was stopped in a car in Baltimore City by the Baltimore City Police Department. Their officers were able to identify him, and they took him into custody for local charges, and then served our arrest warrant on him."
Longus is being held without bond. A preliminary hearing on the drug charges will be held November 7th.