Pima County Sheriff Chris Nanos faces scrutiny over the Nancy Guthrie case after a decade of controversy, including FBI investigations and legal disputes.
An Arizona sheriff's department got more than 4,000 calls within 24 hours after the release of videos of a masked person on Nancy Guthrie's porch. Many tips will be worthless. Others could have merit. Experts say one thing's certain: They can't be ignored.
