Its just a blip of biology, according to the Scottish authorities and their reviewers. Here’s the gist of what took place but doesn’t explain why it took years to review…….is it the prosecution looking bad? If you read the article, a reviewing scientist says one shouldn’t use just a spot of blood to render an opinion. That’s not borne out by the numbers of “trace” DNA prosecutions seen in the US. But this is Scotland, I guess.
“A minute quantity of his DNA [a defendant later acquited ] was found on the handle of one of the guns used to kill Mr Carroll.
This was discredited, however, when it also emerged that the DNA of a lab technician, who had never touched the gun, was also found in the sample analysed by forensic scientists, along with that of three unidentified men.”