More than 100 days after 84-year-old Nancy Guthrie disappeared from her Tucson, Arizona home, investigators are exploring new technological tools to assist in the search. During a recent CrimeCon panel, reporter Michael Ruiz mentioned that federal sources indicated discussions about introducing advanced technology into the investigation. Despite pursuing hundreds of leads, authorities have yet to identify a suspect or motive. The Guthrie family is offering a $1 million reward for information, while the FBI has a separate $100,000 reward. Savannah Guthrie, Nancy's daughter, has personally contributed $500,000 to hire private investigators, believing that additional efforts are necessary beyond official channels. The investigation has faced scrutiny over the handling of evidence, particularly a hair found at Nancy's home that was delayed in being sent to the FBI lab. Panelists also questioned the authenticity of ransom notes associated with the case, suggesting they may not be from a genuine kidnapper.