Twenty-one students and a security guard were stabbed in a matter of about 5 minutes the morning of April 9th.
The suspect, 16-year-old Alex Hribal, will be charged as an adult in the attacks. Police say he used two knives.
Some of the victims are still recovering in the hospital.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.