PCA Report paragraph 78 (i). Title from David and Goliath p152.
78 i) He contends that the stain of Stephen's blood found on David's shorts amounted to no more than a "smidgen". He maintains there is nothing to suggest it got there during the struggle and says it is ridiculous to suggest such a small amount of blood would get on the shorts if they had been worn during the struggle. He says it was transferred as the result of touching Stephen when he found him.
There was more than a smidgen of blood on the shorts. According to Dr Cropp [ESR], the blood stain [a smear rather than a drop] was on the outer surface of the crotch running around the seam. There was sufficient blood to determine it was from Stephen, Laniet, or Arawa. He now describes it as being about the size of a twenty or fifty cent piece and says it could have seeped through outer c1othing. The Police supposed that when he attacked Stephen, David had been wearing outer clothing which was later laundered in the washing machine. It is possible the shorts were worn under outer clothing and blood seeped through during the struggle. They thought he might not have been aware of the blood in the crotch when he put other bloodied clothes through the wash. A further ESR examination as part of the review has confirmed from DNA the blood from the crotch area of the black shorts could have come from Stephen Bain, and not any other member of the Bain family. This confirmed the original result, that the blood was likely to be Stephen's. Mr Karam appears to concede the blood was Stephen's. No results were obtained from the analysis of a very small smear of possible bloodstaining on the cycle shorts he was wearing when the Police arrived.