A number of eyewitnesses have shared on social media the story of assistant football coach and school security guard Aaron Feis.
Feis, a Douglas graduate, reportedly threw himself in front of students during the shooting.
"I mean my son's football coach died. I think the football coach jumped in front of someone and got killed and he's a nice guy," a witness said.
He was taken to a local hospital in critical condition. Thursday morning, the Douglas football team tweeted that coach Feis passed away overnight.
The following people have been confirmed among those killed:
ESPN'S Mark Jones reports, student Maddy Wilford was also among those shot, and is in the hospital. He says she was shot several times, and is facing her 3rd surgery.