T.J. Lane faces three juvenile counts of aggravated murder. He is accused of opening fire on a group of students on Monday in the cafeteria at Chardon High School. In addition to the three victims who were killed, two others were injured.
Lane could be charged as an adult and face the possibility of life without parole if convicted.
Thursday, hundreds of students and parents marched from the courthouse to the school, quietly singing the alma mater. It was a show of solidarity for the victims and their families.
Meantime, Chardon High's assistant football coach, who was praised for chasing the gunman from the school cafeteria, said he wishes he could have done more and thinks the real heroes are the people who responded to the scene.
Coach Frank Hall said he wants the victims' families to know that he was with the victims and wiped their tears. He says they're still in his thoughts and prayers.
Tuesday, authorities named the deceased victims as Demetrius Hewlin, 16, Russell King Jr., 17, and Daniel Parmertor, 16.
Hewlin attended Chardon High. King and Parmertor were students at the Auburn Career Center, a vocational school, and were waiting in the Chardon High cafeteria for their daily bus when they were shot.
Lane did not attend Chardon High but waited there for the bus to Lake Academy, a school for students with academic or behavioral problems.
An 18-year-old girl who was hurt in the shootings has been released from the hospital. The other injured person remains in serious condition.
The Associated Press contributed to this story.