Nancy Guthrie update: Key evidence leads nowhere as Pima County Sheriff's Department investigation hits dead end

Pima County Sheriff's Department faces possible legal action from Carlos Palazuelos, detained in the Nancy Guthrie case; family filed notice of claim for $2.5 million for Palazuelos and $500,000 for Daniel Maddox.

Palazuelos was pulled over on February 10 in Rio Rico and held for seven to eight hours without probable cause, per court paperwork.

During the detention, family member Daniel Maddox was forcibly removed from his home by men in military gear, causing significant property damage.

Hair evidence from Nancy Guthrie's home yielded no results, leading the investigation to a dead end.

Sheriff Chris Nanos' department has not publicly cleared Palazuelos, leaving him under suspicion.