Derrick Callella pleads guilty to sending a fake bitcoin ransom demand to the family of Nancy Guthrie, who is missing from her Tucson home.Investigators say messages were traced to an email and a phone number linked to Derrick Callella's Hawthorne residence and that he used a voice over internet protocol application; the FBI is treating the case as a potential kidnapping for ransom and is examining multiple ransom notes.Derrick Callella is due to be sentenced in September and faces penalties that could include up to 10 years of probation and, under federal statute, up to two years in prison or a $250K fine while the
FBI continues its investigation.