The family of Nancy Guthrie, 84, released a new video appeal Thursday after a ransom deadline passed without contact from those allegedly holding her. In the message, eldest son Cameron Guthrie pleaded for communication to confirm his mother is alive.

“Whoever is out there holding our mother, we want to hear from you,” Cameron said. “We need a way to communicate so we can move forward. But first we have to know that you have our mom.”

Authorities confirmed the FBI is investigating ransom material sent to local and national media, including a letter received by TMZ, though the messages did not include proof of life or communication instructions. Pima County Sheriff Chris Nanos said, “We believe Nancy is still out there.”

Investigators outlined Guthrie’s last known movements. She arrived at a family member’s home Saturday evening, Jan. 31, and returned home later that night. Doorbell camera and pacemaker app data showed disruptions in the early hours of Sunday, Feb. 1. Family members discovered concerning evidence later that morning, prompting a 9-1-1 call. Blood found on the porch was confirmed to belong to Guthrie.

The FBI has deployed additional agents, analysts, a critical response group from Quantico, and a cellular analysis team. A $50,000 reward has been offered for information leading to Guthrie’s recovery and the arrest of anyone responsible.

Savannah Guthrie issued her own appeal Wednesday, stressing her mother’s medical needs and asking for proof of life. Authorities also noted a separate impostor ransom demand led to an arrest but is not connected to Nancy Guthrie’s disappearance.