It's been over six months since Japanese student Ryo Oyamada was killed by an NYPD cop car in Queensbridge, and family members say they're still waiting for answers about what happened on the night of their 24-year-old son's death.

Oyamada was crossing the street at 40th Street and 10th Ave just after midnight on February 21st when a patrol car fatally struck him. The NYPD say officers were responding to a 911 call at the nearby Queensbridge Houses, and the vehicle's emergency lights were engaged at the time of impact, but multiple witnesses contradicted that statement, insisting the cop car did not have its sirens on or lights flashing when Oyamada was hit.

Though some witnesses surfaced immediately following the February 21 incident, the Oyamada family's lawyer says he has yet to find a witness who is willing to speak on the record. "We need the public's help. We need people to come forward to give a sworn statement," attorney Chris Fitzgerald told us today. "For some reason people kind of lost interest, or maybe they don't have the stomach for it." The Oyamadas launched an $8 million lawsuit against the NYPD in May, and they've repeatedly asked the city to release any surveillance tapes and/or other pieces of evidence from the night of the accident.

Freedom of Information Act (FOIL) requests have not yet been fulfilled, and letters to Police Commissioner Ray Kelly and Mayor Bloomberg have gone without response. Gothamist also filed a FOIL request for details regarding 911 calls in the area at that time, which has not been answered. "We just want to know the truth," Chie Oyamada, the victim's mother, said in a statement on Wednesday. "A member of our precious family was taken away by the NYPD and they do not give us the right to know the truth. This is very unfair."

Fitzgerald says the community should be taking more of a stand against the NYPD. "This public safety issue is a bigger issue [than the lawsuit]," he told us. "The next person that gets killed by a speeding cruiser is going to be a son, brother or friend of someone in the community, not just some stranger." And he's urging anyone with information about the crash to contact him.

"Enough people at the time of the incident expressed frustration and anger that this happened. These police officers drive recklessly around this neighborhood, and the death of Ryo is an inevitable consequence of what they were doing," he said. "We need the public's help. We need these witnesses to come forward."