Cops Quiz Neighbors in Nancy Guthrie Case

Police return to Nancy Guthrie's Tucson neighborhood, pressing neighbors with a vital question amid the ongoing hunt for the 84-year-old. Guthrie disappeared from her home on February 1, and detectives comb the area for fresh leads on her whereabouts. The FBI assists with video evidence review and a $100,000 reward for tips leading to her recovery or an arrest. Suspected blood drops near her door and advanced searches using pacemaker signals yield no breakthroughs yet. Read more about this...