After Gregg Thomas pleaded guilty in 2004 to killing a teenager, a Baltimore judge ordered him to serve 15 years in prison. He was out in less than 10, and by last week he had been charged in the shooting ambush of off-duty Baltimore Police Sgt. Keith Mcneill.
The shooting, which left Mcneill in critical condition, put the spotlight on a poorly understood feature of corrections policy that reduces most Maryland sentences. Thomas was able to leave prison early because he had received credit for good behavior and had completed work and education programs that helped him shave off more than a third of his sentence.