>> reporter: chilling video of the shooting emerged, showing students barricading themselves inside a classroom. >> i shouldn't be living here as, you know, going to school. >> reporter: logan sweeney was inside another classroom where he did the same >> i didn't know if i was ever going to see my parents again it was truly terrifying. >> reporter: tonight the suspect pleaded not guilty prosecutors allege he planned the attack long before it was carried out. lester. >> meagan fitzgerald in michigan, thank you. in 60 seconds, a deadly encounter, a suspect in a wheelchair shot to death by a police officer.