Hair found in Nancy Guthrie’s home in Arizona is not linked to any potential suspects in her disappearance, federal law enforcement officials said Thursday.In a brief statement, the FBI’s Phoenix office said that “all hair had been resolved and it does not point to a suspect” in the investigation.The FBI declined to comment further.Pima County Sheriff Chris Nanos told Jattvibe News that the hair had no DNA on it.“To find DNA on hair is extremely rare,” he said. “Hair doesn’t produce DNA like touch DNA or bodily fluids.”01:26Savannah Guthrie shares new plea to bring her mother home00:0000:00The announcement came six months after Guthrie, 84, the mother of “TODAY” co-host Savannah Guthrie, disappeared in what federal authorities have described as a kidnapping-for-ransom case.The FBI said in a statement on July 1 that it had received several ransom notes, including some that could be legitimate, since Guthrie was reported missing on Feb. 1. It described others as illegitimate extortion attempts.The FBI said it is still investigating some of those demands. Earlier Thursday, the Pima County Sheriff’s Department said the investigation is active and ongoing. Monday on Instagram, Guthrie pleaded with whoever may have taken her mother to “tell us where to look for her.”