The mother of Ramarley Graham, Constance Malcolm, met the U.S. Attorney Preet Bharara this week to learn that the Justice Department has opened a full investigation into the killing of her son by a New York police officer.

Ramarley Graham was killed by NYPD officer Richard Haste on Feb. 2, 2012, in the bathroom of his family's home in front of his grandmother and 6-year-old brother after the officer entered the home without a warrant.

A Bronx jury indicted Haste on two counts of manslaughter, the first time an police officer had been indicted for killing a civilian since 2007. The indictment was dismissed, however, because of an error by an Assistant District Attorney when she was instructing jurors. A second grand jury did not re-indict Haste, but the Justice Department said it was reviewing the case.

"We are encouraged that the Department of Justice has opened a full investigation into the killing of our son Ramarley. We believe clear and sufficient evidence of civil rights violations exists for U.S. Attorney Preet Bharara to bring charges against the NYPD officers responsible. Police officers cannot bust into a house without a warrant and shoot an unarmed civilian ... without legal repercussions," Malcolm said.

"The civil rights and lives of black and brown Americans must be protected the same as those of white Americans, and we are looking to U.S. Attorney Preet Bharara, Attorney General Eric Holder and President Obama to ensure that is the case by upholding the law."

Loyda Colon, co-director with The Justice Committe, a Latino/a-led grassroots organization against police brutality and racism, leads one of the groups supporting Ramarley Graham's parents, Constance Malcolm and Franclot Graham, and accompanied them to Wednesday's meeting.

"We are encouraged by this development, but the fight for justice is far from over," said Colon. "The DOJ must convene a grand jury to indict all officers involved in Ramarley's killing on federal civil rights charges. There is ample evidence for an indictment and a conviction.This is an open and shut case."

After the Justice Department said it was reviewing the case, it had not let the family know whether or not there was going to be a full investigation. Graham's family noticed the Justice Department was swift to send FBI agents to Ferguson, Missouri over the police shooting death of teenager Michael Brown and announce it was undertaking an investigation into whether Brown's civil rights had been violated.

READ MORE: Mother of Slain Teen Ramarley Graham Delivers Petition Demanding Justice Department conduct federal investigation

Wednesday's meeting came about because Graham's family and supporters delivered a 33,000-signature petition to the office of the U.S. Attorney in August demanding a meeting with the Department of Justice and requesting civil rights charges be brought against police officers.

READ MORE: DA's office responds to request