DNA Hinge: Guthrie Case Nears 100 Days With FBI Lab Under Spotlight

At the 100-day mark in Nancy Guthrie’s disappearance, investigators say the case could hinge on a strand of DNA being analyzed by the FBI at Quantico; the DNA was recovered from Guthrie’s Tucson home and initially tested at a private Florida lab before being sent to Quantico, with experts stressing that forensic DNA work— including potential family-tree analyses—takes time. A prior DNA lead from gloves yielded a dead end confirming no connection to the case. Authorities continue pursuing doorbell footage, tips, and digital data, while rewards totaling over $1 million are offered for information leading to Guthrie’s recovery or the arrest of those involved.