The Nancy Guthrie mystery took a fresh turn in Tucson, Arizona, after former FBI special agent Maureen O'Connell suggested this week that there may be an ordinary explanation for one of the case's most puzzling details, namely why the 84-year-old may have left her front door open on the night she disappeared.
Speaking on the Brian Entin Investigates podcast, O'Connell said the answer may lie less in recklessness than in habit, particularly in hotter parts of the US, where security doors are used to let air in without surrendering a sense of safety.
