Savannah Guthrie is reportedly growing “increasingly frustrated” with the pace of the official investigation into Nancy Guthrie's disappearance.

Nancy Guthrie, mother of co-anchor Savannah Guthrie, has been missing for four months. Savannah has reportedly invested $500,000 into private investigations.

Savannah Guthrie is also “incredibly upset” after Pima County Sheriff Chris Nanos took a major step amid the investigation into the Nancy Guthrie case.