Teen Seen Moments Before Death in Surveillance Footage

The parents of a Georgia teen look for answers after their son was found dead inside a gym mat.
1:40 | 10/31/13

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Transcript for Teen Seen Moments Before Death in Surveillance Footage
David, thanks very much. There's new revelations of n the suspicious death of a high school student in january. Officials said it was an accident. But now, a judge has released surveillance footage that could change that judgment. Steve osunsami has the story. Reporter: This is the surveillance video, showing the moments before georgia investigators believe that 17-year-old kendrick johnson died. Gets closer to finding out what happened to my son. Reporter: You see the high school athlete for only a brief second in the white shirt, with other students in the gym. Police say some time after walking past this camera, he reached into a rolled-up gym mat trying to get a shoe. And suffocated trying to get out. His family never believed this for a second. This is tough. Reporter: The school system, the sheriff and the coroner have determined that johnson's death was an accident. But a judge agreed with johnson's family, ordering the release of this video, as well as the school's entire case file on the incident. Including, most importantly, the names of these minors playing ball and others who were in or near the gym. We now have the means with which to identify specific students. And what it is they claim to have seen. Reporter: We talked with school officials who insisted there was no foul play. And that johnson's death was saddening. On facebook, johnson's father posted this picture of himself, questioning how anyone could squeeze into a gym mat on their own. A u.S. Attorney watching the case is expected to comment today. For "good morning america," steve osunsami, abc news, atlanta.

This transcript has been automatically generated and may not be 100% accurate.

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