Lie-Witness Account Sniper Witnessâ€™ Information Discredited; Guantanamo Detainees Questioned Oct. 17 â€” Once-promising information from the latest Washington, D.C.-area serial sniper shooting has proven unreliable, investigators said today, as FBI officials confirmed they were looking to Guantanamo Bay detainees for possible clues. FBI officials told ABCNEWS that detainees from the war in Afghanistan being held at the U.S. Navy base in Guantanamo Bay, Cuba, were being questioned about possible planned sniper attacks in the United States. There is no evidence that the serial sniper shootings that have left nine people dead and two seriously wounded since Oct. 2 are terror-related. However, asking Guantanamo detainees about the shootings seemed like a logical step, sources said. Montgomery County, Md., police Chief Charles Moose, who has led the task force investigating the serial shootings, opted not to speculate when asked about a theory that the sniper shootings could be part of a larger terrorism plot. He was more focused on explaining how clues that once seemed so promising following Monday's slaying outside a Home Depot in Falls Church, Va., became dead ends. Investigators had new optimism they would catch the killer because for the first time they believed a witness had clearly seen the gunman's face, his weapon and his getaway vehicle. Today, law enforcement officials said all those descriptions were unreliable because the witness had misled them. "At the time that was still a good description," said Capt. Nancy Demme of the Montgomery County Police Department, the spokeswoman who released the information on Wednesday. "That has been discredited." Authorities had said Wednesday that at least one witness to the shooting of FBI employee Linda Franklin reported seeing a cream-colored van with a malfunctioning taillight, and said the shooter used an AK-74 rifle. The witness reportedly also said the shooter had a dark or olive-skinned complexion, leading him to believe the sniper was Hispanic or of Middle Eastern descent. But those descriptions proved false when the witness admitted to authorities Wednesday night that he was inside the Home Depot store and not in the parking lot at the time of the shooting, sources told ABCNEWS.