Federal agents detained a 20-year-old man in California for allegedly communicating with a teenage shooter who carried out a deadly attack at a private Christian school in Wisconsin. The shooter, Natalie Rupnow, killed a student and a teacher before taking her own life. The detained man, Alexander Paffendorf, admitted to planning a mass shooting and intended to arm himself with explosives and a gun to target a building. Authorities confiscated his weapons and ammunition. The Wisconsin community is mourning the loss of 14-year-old Ruby Vergara and 42-year-old Erin West, who were remembered for their kindness and service. Two students remain hospitalized in grave condition.