A grand jury decided on a first-degree murder charge in March.
He testimony came as part of a plea bargain in order to avoid first-degree murder charges.
But he faces first-degree murder charges, and if convicted, will face a life sentence.
A first-degree murder charge can be based on any one of various circumstances.
Killing someone in the commission of a felony is one standard for a first-degree murder charge.
It was a first-degree murder charge that Stafford had built on circumstantial evidence.
"The grand jury chose first-degree murder charges as appropriate in this case."
His efforts have led to the jailing of three men on first-degree murder charges.
If the two are indicted on first-degree murder charges, they could face the death penalty under Delaware law.
The two Cavanaugh daughters were indicted on first-degree murder charges.