Originally posted by New Waterloo
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Bible John: A New Suspect by Jill Bavin-Mizzi
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Herlock Sholmes
”I don’t know who Jack the Ripper was…and neither do you.”
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When DNA first emerged as a forensic tool it was dubbed 'the genetic fingerprint.' This had the (intended ) effect of convincing the general public of its scientific certainty. Juries remain convinced to this day.
But the reality is slightly different. Both fingerprint and DNA evidence has to be collected without contamination. Even when this is done it is quite likely there will be a smudged partial print or in the case of DNA a mixture with other persons. Finally, the forensic evidence has to be matched by persons expert in the field.
Most of us on this site will be aware of cases where the forensic evidence has been faulty for one of the above reasons. The Shirley McKie case in Scotland in the late 1990s was never fully investigated since it undermined the entire credibility of the fingerprint experts employed by the crown. I recall a rapist convicted by DNA who claimed, correctly as it turned out, that he had never visited the Midlands area where the crime took place. From memory, this was put down to a contamination error inside the laboratory, or perhaps his factory work left his DNA profile on objects sold across the country. Neither fingerprints nor DNA are scientifically infallible.
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Herlocks good inclusion of the Heralds report on the bite/teeth examination is in my opinion a bomb shell. Something is very wrong with all of this. How could there be a report about Mcinnes teeth not matching the bite mark when he had false teeth. Either he didnt have false teeth or he did. If the body that was exhumed had no false teeth and we are certain McInnes had false teeth then we have a fabricated story in the Herald or they dug up the wrong body!!
something is just not right here. just so much confusion.
i am back listening to the Podcast again very carefully.
NW
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Hi Cobalt. Yes I see what you mean but the comments and conclusions drawn after the exhumation do not appear to state that the body examined had false teeth. As Herlock points out the Crown uses the non matching of teeth marks as one factor eliminating McInnes as the killer. This appears to be being used as a factor for all to believe and adding weight to McInnes innocence when it should be mentioned. If it is not mentioned in official reports by the pathologists it is a huge mistake or a sham. It cannot be an error. It is so important that the Crown are using the findings about the bite marks to form their conclusion and then not say they were false. More than odd. Seems ridiculous to me and its been believed by the press and all.
NW
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I have to ask the question if the bite marks were compared to McInnes teeth why were the said teeth not used instead of the femur for DNA comparison. Especially since the results from the femur took months to evaluate and may have been inconclusive.
Teeth are one of the preferred options to extract DNA from, as shown in the Hanratty case which gave up results conclusively , one in a million and a half chance and [ I believe ] pretty quickly .
From the net - Case-by-Case Evaluation:
The best tooth for DNA extraction should be determined based on the specific circumstances of the exhumation and the condition of the teeth.
And -- Presence of Fillings or Dental Work:
Fillings can impact DNA quality and quantity, so teeth with extensive work might be avoided in favor of those with less interference.
- Alternative DNA Sources:
If teeth are not suitable, bone fragments can be an alternative source of DNA.
And an oral pathologist can not make a judgement on either circumstance with any level of certainty given either condition .
Regards Darryl
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- Presence of Fillings or Dental Work:
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Originally posted by Darryl Kenyon View PostI have to ask the question if the bite marks were compared to McInnes teeth why were the said teeth not used instead of the femur for DNA comparison. Especially since the results from the femur took months to evaluate and may have been inconclusive.
Teeth are one of the preferred options to extract DNA from, as shown in the Hanratty case which gave up results conclusively , one in a million and a half chance and [ I believe ] pretty quickly .
From the net - Case-by-Case Evaluation:
The best tooth for DNA extraction should be determined based on the specific circumstances of the exhumation and the condition of the teeth.
And -- Presence of Fillings or Dental Work:
Fillings can impact DNA quality and quantity, so teeth with extensive work might be avoided in favor of those with less interference.
- Alternative DNA Sources:
If teeth are not suitable, bone fragments can be an alternative source of DNA.
And an oral pathologist can not make a judgement on either circumstance with any level of certainty given either condition .
Regards Darryl
They couldn’t check McInnes teeth after the exhumation because he wore dentures.Herlock Sholmes
”I don’t know who Jack the Ripper was…and neither do you.”
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- Presence of Fillings or Dental Work:
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Originally posted by Herlock Sholmes View Post
Hi Darryl,
They couldn’t check McInnes teeth after the exhumation because he wore dentures.
If a person was wearing dentures at death [ and maybe not buried with them ], how can Professor Donald McDonald make any kind of comparison with the bite marks ? Or am I missing something ?
And if the Heralds report [ https://www.heraldscotland.com/news/...-john-suspect/ ], gets this wrong , how can we trust the rest of the article regarding the DNA evidence ?
Regards Darryl
Last edited by Darryl Kenyon; 08-19-2025, 04:18 PM.
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Originally posted by Darryl Kenyon View Post
Yes , I agree Herlock that is the most likely explanation but the Herald specifically says - Bite-mark comparisons were carried out by Professor Donald McDonald, professor of oral pathology at Glasgow University, who said that, while Mr McInnes's teeth might have made the marks, because of the limited detail it was not possible to make a valid judgment about probability. This evidence therefore did not point convincingly to Mr McInnes being the originator of the bite.
If a person was wearing dentures at death [ and maybe not buried with them ], how can Professor Donald McDonald make any kind of comparison with the bite marks ? Or am I missing something ?
And if the Heralds report [ https://www.heraldscotland.com/news/...-john-suspect/ ], gets this wrong , how can we trust the rest of the article regarding the DNA evidence ?
Regards Darryl
Its almost as if the police allowed the criticism that they had received over the exhumation (from family and possibly others) to bounce them into wanting to put an immediate full stop over the whole saga. So they publicly ‘exonerated’ McInnes. And let’s not forget, the whole re-investigation plus the exhumation cost taxpayer’s money. Did they cave in to pressure?Herlock Sholmes
”I don’t know who Jack the Ripper was…and neither do you.”
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The only other explanation is that the body of McInnes did have teeth or part dentures. It certainly could not have been substantially false dentures otherwise the professional in oral pathology would have said it. Bearing in mind there were assistants and other people all around it must be that he did not have false teeth and the teeth that were left were perhaps loose or away from the jaw and unable to confirm they matched the bite.
we need to look again at where the evidence is that McInnes had false teeth I think
NW
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Originally posted by New Waterloo View PostThe only other explanation is that the body of McInnes did have teeth or part dentures. It certainly could not have been substantially false dentures otherwise the professional in oral pathology would have said it. Bearing in mind there were assistants and other people all around it must be that he did not have false teeth and the teeth that were left were perhaps loose or away from the jaw and unable to confirm they matched the bite.
we need to look again at where the evidence is that McInnes had false teeth I think
NW
“Meanwhile, Donald McDonald, Professor of Oral Pathology at Glasgow University, was asked to compare John McInnes’s teeth with the bite mark found on Helen Puttock’s wrist (preserved as it was in a plaster mould). Professor McDonald concluded that, “while Mr McInnes’s teeth might have made the marks, because of the limited detail it was not possible to make a valid judgement about probability.”262 This “limited detail” stemmed from the fact that John McInnes had been fitted with dentures some three years after Helen Puttock’s murder and so there were simply no teeth to compare.263 His dental records have not as yet been found.”
As for the info on McInnes being fitted with dentures three years after the Puttock murder she cites Audrey Gillan from her introduction to the podcast as the source of this info. We don’t know where this information comes from but I think that we can safely assume that AG got it from a solid source. I can’t be certain but it looks like the authorities either weren’t aware of his dentures before the exhumation or, if they had been told about them, then they weren’t sure of the extent of them because they clearly had hopes of a match up with the bite mark.Herlock Sholmes
”I don’t know who Jack the Ripper was…and neither do you.”
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we need to look again at where the evidence is that McInnes had false teeth I think.
This “limited detail” stemmed from the fact that John McInnes had been fitted with dentures some three years after Helen Puttock’s murder and so there were simply no teeth to compare.263 His dental records have not as yet been found.”
We are once again forced to return to the initial investigation. It's understandable that there would have been no dental records for John McInnes in 1995 when the case was re-examined. But as a lifelong resident of the Stonehouse area there would most certainly have been dental records available in 1969, in fact probably up until his death. So the matter of his innocence or guilt could have been resolved at that time. Darryl and New Waterloo are justified in focusing on this anomaly, which the re-investigation seemed reluctant to pursue.
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Originally posted by Herlock Sholmes View Post
From Bible John: A New Suspect by Jill Bavin-Mizzi
“Meanwhile, Donald McDonald, Professor of Oral Pathology at Glasgow University, was asked to compare John McInnes’s teeth with the bite mark found on Helen Puttock’s wrist (preserved as it was in a plaster mould). Professor McDonald concluded that, “while Mr McInnes’s teeth might have made the marks, because of the limited detail it was not possible to make a valid judgement about probability.”262 This “limited detail” stemmed from the fact that John McInnes had been fitted with dentures some three years after Helen Puttock’s murder and so there were simply no teeth to compare.263 His dental records have not as yet been found.”
As for the info on McInnes being fitted with dentures three years after the Puttock murder she cites Audrey Gillan from her introduction to the podcast as the source of this info. We don’t know where this information comes from but I think that we can safely assume that AG got it from a solid source. I can’t be certain but it looks like the authorities either weren’t aware of his dentures before the exhumation or, if they had been told about them, then they weren’t sure of the extent of them because they clearly had hopes of a match up with the bite mark.
I suspect they are Bavin-Mizzis words to explain the term ‘limited detail’ a suggestion which appears to remove suspicion from McInnes (useful for anyone suggesting he was not BJ) when in fact the best we can say about the teeth based on Professor MacDonalds examination and words he used is that the matter remains confused.
NW
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Thanks Darryl you are being very helpful.
Its a case of me trying to get my head round this.
It a moot point I am trying to make. My understanding is that the scientists including Professor MacDonald at no time have stated that McInnes when exhumed had false teeth.
MacDonald states it was 'because of the limited detail' that no positive result could be obtained regarding the bite mark
and the Crown states 'the bite mark showed insufficient points of detail for any degree of probability to be attributed to its authorship'
I don't think my point gets us anywhere really. Its been covered enough but just wanted to record it.
Thanks all
NW
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