Nancy Guthrie Abduction: Masked Suspect Visited Home Before Kidnapping?

• Investigators believe the masked suspect seen on Nancy Guthrie’s doorbell camera may have visited her Tucson home before her abduction.
• FBI released images show the suspect at Guthrie’s front door without a backpack, reportedly on a different day than her disappearance.
• One theory suggests the suspect was initially scared off by the camera, returning later to tamper with it and obscure the lens.
• A suspicious Swiss Gear-brand bag was recovered, but it does not match the suspect's black Ozark Trail Hiker backpack.
• Ransom notes demanding billions in bitcoin have been sent, but pleas from Savannah Guthrie and her siblings remain unanswered.