On the morning of February 21, 2006, five people were found shot to death inside a home in a gated Mesa, Arizona community. The victims included 18-year-old Shane Donovan Duffy, his older brother Steven Duffy, Steven’s girlfriend Tammy Lovell, and Tammy’s two children, 15-year-old Cassandra and 10-year-old Jacob. Neighbors reported hearing a woman’s screams and multiple gunshots before a SWAT team entered and discovered the scene.

Investigators focused on William Craig Miller, the former employer of Steven Duffy and Tammy Lovell. Authorities say the killings were tied to an arson and insurance fraud case: Steven and Tammy had been cooperating with police after a November 2005 fire at Miller’s Scottsdale home that was being investigated as intentionally set to collect insurance. Shane Duffy had worked for Miller’s company but was not directly involved in the arson investigation. Autopsies showed multiple gunshot wounds, with some appearing to be point-blank, consistent with execution-style killings; officials concluded the additional victims were likely killed because they were present.

Anyone with information about Shane, the other victims, or the events leading up to the February 21, 2006 slayings is asked to come forward.