Pamela Williams calls 911. Her home in the Amhurst subdivision has been broken into. She tells the operator that she's hiding in a closet.
When police arrive, they find Williams in the closet. She's been shot at point-blank range in the head.
Six days later, Pamela dies. She was 43.
Determined to find Williams' killer, neighbors and colleagues raise more than $15,000 to offer as a reward.
Two weeks later, police arrest Jonathan Banks, James Sims and James Calhoun. Prosecutors refer to the trio as a “death squad”, saying they were part of a burglary ring that committed more than 100 burglaries in south Fulton County and at least one shooting.
The three are convicted on felony murder and burglary counts in 2016.
But before Williams' tragic death, police had a string of clues in their possession that could have seemingly led to Calhoun. What happened? Why was he still on the streets?
A look back at the evidence police had -- and ignored: