Floundering Pima County Sheriff Chris Nanos insisted Tuesday that authorities in Arizona are “definitely closer” to tracking down the suspect or suspects tied to Nancy Guthrie’s mysterious kidnapping . Nanos made the bold claim during an interview with NBC News when asked if investigators are any closer to that major break in the case — even as he’s faced waves of scrutiny and criticism over his handling of the high-profile probe. “I think the investigators are definitely closer,” he said. “We