Yep. Having worked as an officer in NY State’s prison system for 25 years, I saw plenty. They wear their crimes as a badge of honor, and brag about it. I retired 16 years ago, and I’m sure it’s gotten even worse since then. And convicts hold grudges. They could have had a run-in with someone on the street, and years later, if they ran across that person, a friend, or a member of that person’s family, the grudge would be repaid.
He asked me, "Do you know who Christopher Scarver is?"
I said, "Nope."
He said, "You don't know, and don't care, and the vast majority of people you'd ask wouldn't know or care, but in his mind and in his prison, he's a legend for killing Geoffrey Dahmer. A prisoner has to find meaning where he can."