At his sentence reduction hearing, Mr. Potts had much more to say than he did back in 1999. Before me, he was remorseful, dignified and hopeful. He was proud of all that he had accomplished in over two decades in prison — proud of the courses he took in personal growth, responsible thinking, legal research and software, proud of his participation in nearly every health, nutrition and fitness class available. Perhaps he derived his greatest pride from conquering a debilitating addiction and maintaining his sobriety. As his lawyer explained to me, sobriety is not a foregone conclusion in prison, where drugs are widely available.

I wanted to know how Mr. Potts had managed his life in prison. He told me: “A lot of times I felt like giving up, but I didn’t want to let my mom down, my family.”

He continued: “I kept myself away from a lot of people in prison. I wasn’t around the average people in prison. Prison is an awful place. You have all these different types of organizations and gangs and foolishness. That is not me, ma’am. I’m not like that.

“I made some bad decisions in my life,” he added, “but I am not a bad person.”