Chief Keef has already released three projects this year and he’s gearing up for his fourth. Readying the release of his upcoming The Dedication mixtape, Chief Sosa keeps the streets hot with his latest single “Mailbox” over some knocking D.Rich production. Chief Keef debuted the new song and video yesterday on BET Jams and today, he’s back to hit us with the online premiere of the J.R Saint directed video. The dark clip finds Chief Keef and his crew in the streets and setting fire to skateboards and riding through the city in police cars.