"Three people, including the shooter, are dead. The shooter has now been identified as a 15 year old Natalie Rupnow who went by the name Samantha. She was a student at the school, and evidence suggests she died," the police chief said.
He noted that in addition to those dead, six students and one teacher were injured, two of the injured students remain in critical condition with life-threatening injuries.
"We are still working to determine a motive. Detectives have talked to her family members this evening, as well as conduct a search of the shooter's home here in Madison," Barnes said.
A second-grader reported the incident to police, he added.