shows something else. >> it shows evidence that kendrick was murdered. >> reporter: cnn has obtained the evidence of the nearly 700 photos taken at the scene. for the first time, kendrick's parents, kenneth and jacqueline johnson are ready to look at them. including these gym shoes. >> do these shoes belong to kendrick? >> no. >> when you look at these shoes that were at the scene, what stands out to you? >> the blood on the shoe. >> but investigators show tests show the stains are something other than blood so the shoes were not collected as potential evidence. >> i don't understand why. >> reporter: cnn took it to former fbi special agent harold copeis. if you were on this scene, would this be something you left? >> no, bag and tag. >> reporter: there's no indication that the investigators even looked for the owner of the shoes or this