Pottawattamie County Attorney Matt Wilber says that Dakota Escritt was clearly the initial aggressor in a clash with Gregary Teer that ended in Escritt's death. No charges will be filed against Teer.The confrontation began in the AL cafeteria. There was an exchange of words between a few people although Escritt was wearing earbuds at the time and did not hear most of those exchanges. Authorities say that at one point Teer and a friend left the cafeteria. Dakota Escritt followed them into a commons area.County Attorney Matt Wilber said, "Dakota clearly went off in pursuit." Surveillance Picture Wilber said Escritt approached Teer on some stairs and pushed him. Wilber said they moved down the steps, Escritt pushed him three times before Teer retaliated. Teer threw one punch and Escritt fell to the ground. Escritt was still conscious after initially falling. Teer walked away.A teacher came to render aid while another teacher went for additional help. Wilber said that witness accounts of the incident have been contradictory. He said, “That complicated matters for us but in the end the video tells the story.”He also said, “In Iowa you are entitled to use reasonable force to defend yourself,” and he said, "This is not a case of deadly force being used," even though Escritt did eventually die.Wilber said Teer, “intended to throw a punch and he did throw a punch,” but he didn’t intend for anyone to die. Surveillance Photo Teer said Wednesday, "I didn't mean for any of this to happen." The fight took place last Thursday. Escritt died Saturday at Children's Hospital and Medical Center in Omaha.CCTV Footage