CNN Forensic Files May 3, 2015 04:19:00
Front of the robe. but then he looked on the back. he found hundreds of tiny specs of blood, high-velocity blood spatter, the type that would be created by a high-powered rifle. dna testing showed the blood came from both diane and alan johnson. this proved the killer wore the robe backwards. but investigators needed to prove that sarah wore the robe on the morning of the murders. to do that, they had to analyze the shirt she had on that day. >> sarah johnson had a blue cotton t-shirt with green paint smeared on to it. so, therefore, i'm thinking, well, let's examine the blue shirt now and see...