Pima County Sheriff’s officials say no individual has been permanently excluded from the investigation into Nancy Guthrie’s disappearance, meaning previously detained people could face renewed scrutiny if new evidence emerges. The case remains unresolved, and the sheriff’s position highlights the continuing uncertainty over both Guthrie’s whereabouts and the identity of any possible suspect.

A man who was previously detained in connection with the inquiry is preparing a $3.25 million notice of claim against authorities, according to the article. Investigators reportedly searched after receiving information suggesting either Guthrie or a potential perpetrator might be at a particular location, but neither was found; a crime-scene hair sample also reportedly did not produce a usable DNA profile.