Luigi Mangione describes daily prison routine in letter to nursing student following killing of UnitedHealthcare CEO

MDC Brooklyn is an administrative security metropolitan detention center (Andrew Lichtenstein/Corbis via Getty Images)

Mangione then apparently goes on to recommend that the letter reader read a book by Kristin Neff titled Self-Compassion: The Proven Power of Being Kind to Yourself, remarking it was a ‘great source of support for [him] during [his] freshman year of college’.

“I understand the feeling of wanting to give up at times,” the letter continues. “Navigating young adulthood can be tough, but I believe we can all find our way through.

“I wish you the best of luck with your graduation next semester. You have a bright future ahead.”

The Reddit post has proved popular, with hundreds of users coming out to debate the letters’ contents.

“Wow. I’m surprised he is able to comfort people who write to him even in his circumstances.

“At least he seems to be enjoying his time with his inmates who he’s referring to brothers lol,” one wrote of Mangione, who has been described as a ‘model prisoner’ by veteran of New York City’s criminal justice system, Karen Friedman Agnifilo.

Someone else responded: “50 years from now they’re going to sell books of all these letters over the years. It’s wild what has evolved from what he did.”

“Is there any chance these letters would be used in his upcoming trial to defend him?,” a third commented.