Claude Bloodgood

Claude Frizzell Bloodgood III was a controversial American chess player. As a young man, he got into trouble with the law and was arrested several times. He was sentenced to death in 1970 after having been convicted of murdering his mother, although this sentence was later commuted to life in prison. While in prison, he remained a very active chess player, playing a large number of correspondence games and rated games with other inmates. Over time, he achieved a very high ranking in the United States Chess Federation (USCF) by playing in a closed pool, which allowed rating manipulation. He died in prison in 2001.

— Source: Wikipedia (CC-BY-SA).