The twin half brothers of Ramarley Graham, the Bronx teen fatally shot by a police officer in February, were convicted Tuesday for gun possenion and being part of a Harlem street gang. Hodean and Kadean Graham were sentenced to eight years in jail for heading a crew known as "One-Twenty-Nine" and "Goodfellas/The New Dons" between 2007 and 2011 in the area around W. 129th Street, between Lenox and Fifth Avenues. The 20-year-old brothers were cleared of attempted murder. "This violent street gang was as young as it was dangerous, its members having been involved in multiple shootings over a four-year period," Manhattan District Attorney Cy Vance said in a statement. Fifteen members of the gang were convicted on charges of drug dealing and weapons possession. Last week, police officer Richard Haste, 31, pleaded not guilty to manslaughter for shooting Ramarley Graham in the Bronx while officers were investigating a drug deal. As officers made the bust, they were radioed that Graham was armed, when he in fact was not. Graham was shot was trying to flush a bag of marijuana down a toilet. Haste's attorney said in court that the officer was conviced the teen was carrying a weapon.