Derrick Anthony Callella has pleaded guilty to federal charges stemming from a hoax ransom demand in connection with the disappearance of Nancy Guthrie in Tucson, Arizona. The FBI investigated the note, which was determined to be fraudulent.

Callella's plea occurred after authorities concluded that the ransom demand was not legitimate. The specifics of the federal charges he admitted to were not immediately detailed in the reporting.

The case involves the ongoing disappearance of Nancy Guthrie, whose whereabouts remain unknown. The discovery and investigation of the fake ransom note marked a significant development in the search for Guthrie. Further details about the timeline of the investigation and Callella's alleged involvement are expected as the legal proceedings continue.