SCOTTSDALE, Ariz. — This week marks the 25th anniversary of one of Arizona's most notorious unsolved crimes. On the morning of April 10, 2001, Scottsdale police responded to reports of an explosion at a home near 74th and Oak streets. Upon arrival, the bodies of Mary Fisher and her two children, Bobby and Brittney, were discovered in the burning residence. The three victims appeared to have sustained fatal injuries before the house fire. And the family's patriarch, Robert Fisher, was nowhere to be seen. Police later named Fisher as a suspect as investigators believed he rigged the family's home to...