Morse was not trained to react to blood.
Part of the controversy of D'Andre Lane's conviction for the murder of his (I think!) step-daughter was that there were no retrievable remains.
But judges held the conviction, nonetheless, to be safe.
Morse was trained to detect blood (a part of human remains) so you are wrong.
Lane is facing mandatory life in prison if convicted. The case relies on circumstantial evidence and is using a cadaver dog named Morse, who is handled by forensic canine expert Martin Grime.
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You have no way of telling what Morse responded to,”said Johnson, noting the positive detection hasn’t been connected to Bianca’s body or anyone else’s. “You don’t know if it was a positive or negative response.”
Grime conceded a determination is usually made when something is found.
“The corroboration would normally be you finding a cadaver, bone or human blood that I could see,” he told Johnson, adding that the dog has never given a false response.
Rex A. Stockham, forensic canine program manager for the FBI, also testified about Morse on Wednesday. He said the English springer spaniel is regularly tested for proficiency, and while no dog is perfect, Morse has been accurate.
“I’m aware of no false positives for Morse,” he said. “We’ve never had any case yet where the dog has responded and it’s been shown to be incorrect.”
http://madeleinemccann.org/blog/2014/04/20/bianca-jones-trial-of-dandre-lane/