Police identify Wisconsin school shooting suspect as a 15-year-old female student

A 15-year-old girl has been identified as the student who opened fire at Abundant Life Christian School in Madison, Wis., on Monday morning, police said.

A teacher and a student were killed, and two students remain in critical condition, Police Chief Shon Barnes said in a Monday night press briefing. The suspect, identified as Natalie Rupnow, who also went by the name Samantha, was pronounced dead while being taken to a hospital. Authorities believe she died of a gunshot wound, he said, though the cause of death has not yet been determined by the medical examiner.

A second-grader called 911 shortly before 11 a.m., alerting police to the shooting at the school, which teaches students from kindergarten through high school, Barnes said. "Now let that soak in for a minute," Barnes said. "A second-grade student called 911 at 10:57 a.m. to report a shooting at school." Officers arrived at the school minutes later, where it was soon determined that the shooting suspect was already down, he said.