The shooter at a religious school in Wisconsin had two handguns with her but used only one in the attack that killed a teacher and a student and wounded six others, the city’s police chief said in an interview with The Associated Press on Wednesday.Police were still investigating why the 15-year-old student at Abundant Life Christian Christian School in Madison shot and killed a fellow student and teacher on Monday, before shooting herself, Madison Police Chief Shon Barnes said. Two other students who were shot remained in critical condition on Wednesday.“We may never know what she was thinking that day, but we’ll do our best to try to add or give as much information to our public as possible,” Barnes said.The student who was killed was identified in an obituary released Wednesday as Rubi Patricia Vergara, 14, of Madison. She was a freshman at the school and “an avid reader, …