Genco published on an incel site that he had also shot couples and “foids”– brief for “femoids,” an incel term for women– with orange juice from a water gun, which made him feel “spiritually linked to the saint on that day,” according to the indictment.On Aug. 3, 2019, Mr. Genco wrote a manifesto entitled “A Hideous Symphony,” by “Tres Genco, the socially exiled Incel,” in which he stated that he would “slaughter” females out of “revenge, hatred and jealousy,” district attorneys stated. That same day, Mr. Genco searched online for sororities and a university in Ohio, which was not called in a federal indictment.On Jan. 11, 2020, district attorneys stated, Mr. Genco composed another file entitled “separated,” in which he said: “If youre reading this, Ive done something terrible.”Four days later, Mr. Genco performed surveillance at an unknown university in Ohio and searched on the internet for “planning a shooting criminal offense” and “when does preparing for a criminal activity become an effort,” prosecutors said.On March 11, 2020, Mr. Genco browsed online for cops scanner codes for the police in Columbus, Ohio, and university police, prosecutors said.The next day, the police went to Mr. Gencos home and discovered, in the trunk of his car, a firearm with a bump stock connected, numerous crammed publications, body armor and boxes of ammunition, district attorneys said.Inside Mr. Gencos house, authorities officers discovered a Glock-style 9-millimeter semiautomatic pistol with no manufacturers marks or serial number, hidden in a heating vent in his bed room, prosecutors said.Seamus Hughes contributed reporting.