Authorities appeared to come to another dead end in their investigation into Nancy Guthrie’s disappearance, after they released a man detained in connection with the case overnight. 

The Pima County Sheriff’s Department detained the man for questioning on Tuesday during a traffic stop south of Tucson. The sheriff’s office and the FBI then conducted a court-authorized search of his home in Rio Rico. His detention came shortly after the FBI released a series of chilling doorbell camera videos and still images of a masked person appearing to tamper with Nancy Guthrie’s security camera and pacing the elderly woman’s front porch the night she vanished without a trace from her Arizona home eleven days ago.