FLORENCE, AZ (AZFamily) — A man is set to be executed on Friday, more than three decades after he killed four members of the same Phoenix family in an act of revenge against a coworker.

Richard Djerf, 55, is scheduled to be executed at 10 a.m. on Friday at a state prison facility in Florence.

The 1993 murders

On Sept. 14, 1993, Djerf used a ruse to get into a west Phoenix home where his Safeway co-worker, Albert Luna, Jr., lived. Djerf wanted to get back at Luna, believing he had stolen property from his apartment.

But Albert wasn’t there at the time.

Instead, Djerf held four other members of the Luna family hostage. He eventually murdered Albert’s mother, Patricia, his father, Albert Sr., his 5-year-old brother and his 17-year-old sister, whom he also sexually assaulted. Djerf then

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