Investigators in Tucson, Arizona, have confirmed that a hair recovered from inside 84‑year‑old Nancy Guthrie's home has produced no usable DNA profile, dealing a frustrating blow to a case that has gripped viewers across the United States for nearly six months.
The update was given by Pima County Sheriff Chris Nanos, who said the strand, once seen as a potentially crucial piece of evidence, has now been ruled out as a direct link to any suspect.
