Authorities are continuing to withhold key evidence in the baffling abduction case of Nancy Guthrie, even as the investigation passes the 100-day mark, Pima County Sheriff Chris Nanos said this week. “Absolutely,” Nanos said when asked whether investigators were keeping certain evidence from the public. “But it’s not because we want to keep it secret,” he added. “It’s because we have to protect the integrity of the case.” #nancyguthrie #chrisnanos #savannahguthrie