parents kenneth and jacqueline johnson knew something was wrong. >> there is a dead body out here. >> okay. where at, sir? >> lowndes high school in the gym. >> reporter: this is a photo of him found the next morning upside down in the center of a rolled six-foot wrestling mat. >> i just got weak, nervous. >> reporter: investigators believe kendrick got stuck if the mat while reaching for this shoe, that had fallen into the center of that mat. >> we examined all the alternatives presented to us and the only one that fit, the physical evidence and the forensic evidence and the testimonial evidence was this an an accident. >> reporter: but it didn't add up with kendrick's family and this picture of kendrick only fueled concerns. >> as handsome as my son was, and you see him like that is crazy. i really feel he was murdered. >> reporter: the photo has gone viral online, shared thousands of times through social media. >> what do we want?