A chilling development in the Nancy Guthrie case: authorities have detained a person of interest, but questions remain. Nancy Guthrie, the mother of US news anchor Savannah Guthrie, was abducted from her home near Tucson, Arizona, over a week ago, sparking a widespread search and desperate appeals from her family. The Pima County Sheriff's Department confirmed a court-authorised search at a location in Rio Rico, south of Tucson, as the investigation continues. The detained individual, whose identity has not been released, was taken into custody at a traffic stop. Sources familiar with the investigation told CBS News that the police are also searching the suspect's home. This comes as the FBI released images and videos of a masked individual at Nancy Guthrie's doorstep on the night of her disappearance, armed and appearing to tamper with the camera. FBI Director Kash Patel stated that new images uncovered by law enforcement show an armed individual at Nancy Guthrie's front door the morning of her disappearance. These images, previously inaccessible, suggest the individual may have tampered with the camera. Savannah Guthrie shared a new video on Instagram, urging the public to recognize the individual and bring them home. The White House is closely monitoring the situation in Tucson, with President Donald Trump reviewing the surveillance footage and expressing disgust. Trump directed the press secretary to encourage Americans with information to contact the FBI. The case is considered unusual, with authorities investigating a series of ransom notes containing deadlines. Savannah Guthrie and her siblings have released videos pleading for their mother's release, highlighting her fragile health and constant pain. The family has warned that Nancy Guthrie's health is at risk without her medication, which was found to be disconnected from her pacemaker on the night of her disappearance. Blood was also found on her porch, confirmed to be hers. The FBI is offering a $50,000 reward for information on the case, as the investigation unfolds with many unanswered questions.