A self-described incel has admitted in federal court to planning a mass shooting at Ohio State University, officials said. Tres Genco, 22, pleaded guilty Tuesday to attempting to commit a hate crime—an offense which carries a possible life sentence as the plot involved attempts to kill, according to prosecutors. Genco was arrested in March 2020 after someone feared he planned to hurt himself or others after he barricaded himself in a room with a gun. Authorities managed to get Genco to surrender and found he had an AR-15-style rifle with a bumper-stock, along with a Glock pistol to fire fully automatically. He admitted to possessing the weapons as part of his plot, prosecutors said. Investigators also found writings dating back to 2019 in which Genco said he planned to “slaughter” women “out of hatred, jealousy, and revenge.” One note indicated he hoped to kill as many as 3,000 people, prosecutors said. FBI agents say Genco surveilled Ohio State University and researched sororities online. “Genco formulated a plot to kill women and intended to carry it out. Our federal and local law enforcement partners stopped that from happening,” U.S. Attorney Kenneth Parker said in a statement.