Nancy Guthrie update: Expert reveals which mistake could lead to arrest, ‘if they did a reverse…’

Nancy Guthrie update: Retired detective says suspect may have left a major clue; 'could break it wide open;

A retired detective says the key to solving Nancy Guthrie's disappearance may already exist in digital records or buried investigative tips.

Nancy Guthrie’s kidnapper’s name hidden in thousands of tips and leads? Retired detective's ‘twofold' abduction theory can leave you shocked