Patrick Eugene Prendergast

Patrick Eugene Joseph Prendergast (6 April 1868 – 13 July 1894) was an Irish-born American newspaper distributor who assassinated Chicago Mayor Carter Harrison III, fatally shooting the five-term mayor on October 28, 1893. Following a murder trial and a subsequent proceeding in which the defense tried unsuccessfully to have him acquitted by reason of insanity, Prendergast was ultimately found guilty and sentenced to death for the assassination.

Source: Wikipedia — Patrick Eugene Prendergast (CC BY-SA 4.0)