Chrisopher Havens: Math Genius – In Prison https://www.doc.wa.gov/news/docs/2017-0317-podcast-inmate-haven.pdf https://www.humanme.org/2018/10/contrast-1-of-2-by-christopher-havens.html https://interestingengineering.com/murder-convicts-love-for-math-lead-to-brand-new-discoveries-in-number-theory