New Delhi, Feb. 4 -- The investigation into the disappearance of Nancy Guthrie, 84-year-old mother of Today show anchor Savannah Guthrie, has taken a dramatic turn with new claims from journalist Ashleigh Banfield. On her podcast Drop Dead Serious, Banfield cited an unverified law enforcement source suggesting that Nancy's son-in-law, Tommaso Cioni, Savannah Guthrie's brother-in-law, could be a person of interest in the case.

Banfield also reported that two Nest security cameras at Nancy's home were smashed, and that authorities seized the car of Nancy's daughter, Annie Guthrie, who was the last person known to see her mother on the night of January 31.

While Banfield stressed that her information is unconfirmed and "just musings," it a...