A 19-year-old man with a semi-automatic rifle burst through the front door of the Chabad of Poway on April 27 in Southern California, opening fire on worshipers celebrating the final day of Passover in the synagogue. After firing several rounds, his rifle jammed, providing a member of the congregation an opportunity to rush him and chase him out of the synagogue to his car. A second member of the congregation, an armed off-duty U.S. Border Patrol officer, opened fire as the shooter fled, striking his car. Police apprehended the suspect shortly after he left the synagogue, where he had killed one person and wounded three others, including the rabbi. Had his rifle not malfunctioned, the casualty count undoubtedly would have been greater. The Poway shooter had written a manifesto in which he also confessed to setting a fire at Dar-ul-Arqam mosque in Escondido, California.