Justin Mohn, a 33-year-old man from Bucks County, Pennsylvania, is on trial for the January 2024 killing and beheading of his father, Michael Mohn. The case gained attention after Mohn posted a video of his father's severed head online and called for others to help him overthrow the U.S. government. During the trial, Mohn testified in his defense, stating that the killing was "Plan B" after his attempt to perform a citizen's arrest on his father for alleged false statements and treason failed. The trial is taking place in the Philadelphia suburbs.