Volodymyr Petryshyn
Walter Volodymyr Petryshyn was a Ukrainian mathematician.
On 6 May 1996, Petryshyn killed his wife, Ukrainian-American painter Arcadia Olenska-Petryshyn. He suffered from a severe depression which caused the tragedy and was found not guilty by reason of insanity. In 2012, he became a fellow of the American Mathematical Society.