Friends and family say they're not letting up in their quest for justice for the unarmed Bronx teen shot and killed by police in a drug bust gone wrong. The sixth weekly rally for Ramarley Graham began at his home, where he was killed, and it ended at the 47th precinct. Family and friends held up signs, chanted and passed out flyers to cars passing by. During this particular march, someone played a song in remembrance of Graham that brought protesters to tears. Police originally thought Graham had been dealing drugs and had a gun, but he was unarmed. No charges have been filed against any of the officers. Protesters say they'll rally for 18 weeks to signify Graham's age when he was killed. Rallies for slain Bronx teen enter 5th weekFamily of slain Bronx teen to hold weekly vigilsReports: Grand jury to mull charges in Ramarley Graham shooting