The family of an unarmed African-American teen shot dead by New York City police in his own home has filed a lawsuit one year after his killing. Ramarley Graham was shot at close range on February 2, 2012, after being chased by narcotics officers into his building. Police say Graham was trying to empty a small bag of marijuana into the toilet before he was killed. In their lawsuit against the NYPD, Ramarley’s family says the officers threatened to kill Ramarley’s distraught grandmother in the moments after she witnessed the shooting. The officer who killed Ramarley, Richard Haste, was charged with manslaughter last year. On Saturday, hundreds of people marched to a Bronx police precinct to mark the first anniversary of Ramarley Graham’s death.