New York man allegedly beats up stranger for wearing pro-Trump hat in supermarket: police

Joseph O'Boyle, a 23-year-old Pennsylvania man, pleaded guilty to killing a chiropractor who he blamed for worsening his jaw pain, according to the Bucks County District Attorney's Office.

from FOX News : U.S. https://www.foxnews.com/us/pennsylvania-man-sought-treatment-jaw-pain-murders-chiropractor