The silencer evidence showed the blood was specific to Sheila. The rifle therefore too long for her to shoot herself. At the time no one disputed the blood evidence.
It was therefore impossible for Jeremy to be innocent. But Taff still believed this. Was this guy for real ?
The "silencer evidence" didn't show the blood was specific to Sheila. It was not possible to prove in 85/86 that blood found at the soc belonged to a specific individual. It was limited to showing that any blood found at a soc matched an individual's blood type/group only which will be shared by many members of the human population.
The following table shows the blood type/group, enzymes and a protein for all victims including the sample found in the silencer and RB's. As you will see SC's and RB's both match the sample found in the silencer. The reason for this is that the blood/type group, enzymes and protein are shared by many members of the human population and are not unique to individuals.
ABO PGM EAP AK Hp
Nevill Bamber O PGM1+ EAP BA AK1 Hp2-1
June Bamber A PGM1+ EAP BA AK2-1 Hp2-1
Daniel Caffell O PGM2+1+ EAP B AK1 Hp2
Nicholas Caffell O PGM2+1+ EAP B AK1 Hp2
Sheila Caffell A PGM1+ EAP BA AK1 Hp2-1
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Blood In Silencer A Nil EAP BA AK1 Hp2-1
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Robert Boutflour A PGM1+ EAP BA AK1 Hp2-1
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ABO = Blood Group System
PGM = Phosphoglucomutase (Enzyme) Breaks down quickly outside the body hence blood in silencer was unable to produce a reading
EAP = Erythrocyte Acid Phosphatase (Enzyme)
AK = Adenylate Kinase (Enzyme)
HP = Haptoglobin (Protein)
As the silencer was found by the relatives JB's defence asked all to provide a blood sample to rule out contamination. The relatives obliged and a match was found between SC and RB.
The jury were misled on this point by the judge in his summing up:
Page 12 of summing uphttp://miscarriageofjustice.co/index.php?action=dlattach;topic=273.0;attach=899"Now I think that does complete the evidence of those experts, so it all comes down to this, does it not? Mr Hayward says, "Well to begin with, merely analysing the blood inside the moderator, it correponds with Sheila Caffell's.
Page 13 of summing uphttp://miscarriageofjustice.co/index.php?action=dlattach;topic=273.0;attach=901"then come to Mr Fletcher's evidence: "One of Sheila's wounds clearly was a contact wound", so that is entirely consistent with it being her blood in the end of the moderator".
The above statements imply that the evidence points to Sheila's blood being found in the moderator. This is WRONG as it was impossible to conclude then that Sheila's blood was in the moderator. It was only possible to state that the blood found in the silencer matched Sheila's blood type/group which is not exclusive to her and also matched RB's.
It appears that the possibility of contamination and the fact that it could never be proved that Sheila's blood was in the silencer was never presented to the jury?