NEED TO KNOW

The murder of the McStay family is now the subject of a new two-hour ABC 20/20 episode airing Friday, Oct. 3, at 9 p.m. EST

Joseph McStay and his wife Summer, along with their 4-year-old son Gianni and 3-year-old son Joseph Jr., disappeared in 2010

Their remains were discovered three years later in shallow graves in the Mojave Desert near Victorville, Calif.

Joseph McStay and his wife Summer, along with their 4-year-old son Gianni and 3-year-old son Joseph Jr., disappeared in 2010 — four months after they moved into their two-story home in the San Diego suburb of Fallbrook, Calif.

Left unattended at the home were the family’s two beloved dogs Bear and Digger.

Authorities also found rotting food on the kitchen counter and clothes tossed on the floor, though there was

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