TUCSON, Arizona — With 84-year-old Nancy Guthrie missing for nearly two weeks, the Federal Bureau of Investigation said Thursday it is doubling the reward for information that could help locate her and providing newly confirmed identifying details about a potential suspect.

FBI sources say Pima County Sheriff Chris Nanos is blocking federal agents from obtaining key evidence in Nancy Guthrie's disappearance case.

By Jana Winter WASHINGTON, Feb 12 (Reuters) - An Arizona sheriff is blocking FBI access to key evidence in the investigation into the abduction of U.S. television journalist Savannah Guthrie's mother,

Live updates about the search for Nancy Guthrie, the mother of "TODAY" co-anchor Savannah Guthrie was authorities say was taken from her Arizona home nearly two weeks ago.

Retired Pima County homicide detective Kurt Dabb and former FBI agent Jason Pack interpret a perceived rift between the FBI and the Pima County sheriff on ‘The Will Cain Show.’

Ring founder Jamie Siminoff says Ring does not retain deleted footage without a subscription as the FBI confirms video was recovered from backend systems in the Nancy Guthrie disappearance.