The biggest development over the latest seven days is not a breakthrough arrest, but a renewed public push: Nancy Guthrie’s family has intensified its appeal for information, Savannah Guthrie has given her first extended television interview since her mother’s disappearance, and investigators have continued to emphasize that the case remains active even though no suspect has been publicly identified. Authorities still believe Nancy Guthrie, 84, was taken against her will from her Catalina Foothills home near Tucson, and the FBI reward of up to $100,000 remains in place alongside the family’s separate $1 million reward.