Dlk79
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There's been some talk recently about the DNA found in 5A and how significant this is/could be.
There can be a lot of misconception when people hear the word DNA because most people don't really understand the science behind it and assume the investigative process is massively encompassing in picking up what's happened within an enviroment. It is not.
In particular, the argument that CB must have been in and out within minutes doing a planned abduction (as opposed to being in there a longer period) else his DNA surely would have been found has no real basis.
Linked below are the results from the DNA analysis carried out by the PJ in the initial sweep (i.e. doesn't include the later dog blood findings etc).
P.J. POLICE FILES: PORTUGUESE FORENSIC INSTITUTE TESTS
These documents are a bit technical and convoluted but I will try to summarise what it is they actually found and tested. Across several locations, they tested 447 samples in all. Of these, 2 were objects found in a car boot, 1 was a saliva sample found in 5A and the other 444 were all hairs. So the first thing to note there, is despite all the other bodily fluid samples that would have undoubtedly been in 5A and elsewhere, only one sample was actually tested. Everything else analysed in 5A were just hairs. So, first thing that comes to mind, is that if CB was wearing a beanie type hat (as many burglars do) or something similar, he immediately has an advantage in avoiding leaving a DNA trace for PJ to find.
When doing DNA analysis on these hairs and 3 other samples found, they had 25 reference samples to compare against, i.e. 25 people had given their DNA sample to test against which would have included all of the Tapas group plus a number of OC staff and other people such as police officers known to have been in the apartment so as to rule their samples out as those of a potential intruder.
In all, there were 98 samples where they were unable to obtain a result (this included the saliva sample but after later expanding their reference samples they attributed this to a 2yr old former occupant of 5A) and a further 19 where only a partial result was found. 12 samples were found to be non-human. Of the 85 samples they found a match to within 5A, these are the results -
77 were attributed to the McCann family
3 were attributed to Vitor Manuel Martins (a GNR officer who responded to the crime)
2 were attributed to Russel O'Brien
1 was Matthew Oldfield
1 was David Payne
1 was Maria Irene Trovaro Ferro (who I think was also a responding officer)
So, despite this extensive DNA sweep, they were unable to find samples of several other people who we already know for a fact were in the apartment on the 3rd and the preceding days. Taking just one of those examples, Fiona Payne, her rogotary statement is here.
P.J. POLICE FILES: FIONA PAYNE ROGATORY
She claims to have stayed with Kate in the apartment for much of the night of the 3rd following MM's disappearance.
"for the most part on the night, as I said, I was just milling in the apartment and out on the balcony and just outside their front door, erm with, with Kate, erm I was there in the apartment when the first lot of Policemen arrived, which I think was around sort of between eleven, quarter past eleven. Er I was there when they did their initial search and we just followed them really..."
"'...I stayed in the apartment, erm I was aware later that the GNR were there as I say they were wandering round the front and the back and, and the time when I came out and met Robert MURAT, erm I'm assuming that was sort of after sort of midnight, "
So, here we have someone who was in the apartment for a couple of hours on the 3rd, moving around, with no hat on and not making any attempt to conceal shedding any DNA. And yet not one DNA sample of hers was found in 5A despite nobody having cleaned the scene before forensic samples were swept for.
Going back to the original point I was raising, the idea that someone like CB, who is clearly forensically aware, couldn't have been in the apartment for very long, else his DNA would 'surely' have been found, is just fanciful thinking. It doesn’t work that way.
There can be a lot of misconception when people hear the word DNA because most people don't really understand the science behind it and assume the investigative process is massively encompassing in picking up what's happened within an enviroment. It is not.
In particular, the argument that CB must have been in and out within minutes doing a planned abduction (as opposed to being in there a longer period) else his DNA surely would have been found has no real basis.
Linked below are the results from the DNA analysis carried out by the PJ in the initial sweep (i.e. doesn't include the later dog blood findings etc).
P.J. POLICE FILES: PORTUGUESE FORENSIC INSTITUTE TESTS
These documents are a bit technical and convoluted but I will try to summarise what it is they actually found and tested. Across several locations, they tested 447 samples in all. Of these, 2 were objects found in a car boot, 1 was a saliva sample found in 5A and the other 444 were all hairs. So the first thing to note there, is despite all the other bodily fluid samples that would have undoubtedly been in 5A and elsewhere, only one sample was actually tested. Everything else analysed in 5A were just hairs. So, first thing that comes to mind, is that if CB was wearing a beanie type hat (as many burglars do) or something similar, he immediately has an advantage in avoiding leaving a DNA trace for PJ to find.
When doing DNA analysis on these hairs and 3 other samples found, they had 25 reference samples to compare against, i.e. 25 people had given their DNA sample to test against which would have included all of the Tapas group plus a number of OC staff and other people such as police officers known to have been in the apartment so as to rule their samples out as those of a potential intruder.
In all, there were 98 samples where they were unable to obtain a result (this included the saliva sample but after later expanding their reference samples they attributed this to a 2yr old former occupant of 5A) and a further 19 where only a partial result was found. 12 samples were found to be non-human. Of the 85 samples they found a match to within 5A, these are the results -
77 were attributed to the McCann family
3 were attributed to Vitor Manuel Martins (a GNR officer who responded to the crime)
2 were attributed to Russel O'Brien
1 was Matthew Oldfield
1 was David Payne
1 was Maria Irene Trovaro Ferro (who I think was also a responding officer)
So, despite this extensive DNA sweep, they were unable to find samples of several other people who we already know for a fact were in the apartment on the 3rd and the preceding days. Taking just one of those examples, Fiona Payne, her rogotary statement is here.
P.J. POLICE FILES: FIONA PAYNE ROGATORY
She claims to have stayed with Kate in the apartment for much of the night of the 3rd following MM's disappearance.
"for the most part on the night, as I said, I was just milling in the apartment and out on the balcony and just outside their front door, erm with, with Kate, erm I was there in the apartment when the first lot of Policemen arrived, which I think was around sort of between eleven, quarter past eleven. Er I was there when they did their initial search and we just followed them really..."
"'...I stayed in the apartment, erm I was aware later that the GNR were there as I say they were wandering round the front and the back and, and the time when I came out and met Robert MURAT, erm I'm assuming that was sort of after sort of midnight, "
So, here we have someone who was in the apartment for a couple of hours on the 3rd, moving around, with no hat on and not making any attempt to conceal shedding any DNA. And yet not one DNA sample of hers was found in 5A despite nobody having cleaned the scene before forensic samples were swept for.
Going back to the original point I was raising, the idea that someone like CB, who is clearly forensically aware, couldn't have been in the apartment for very long, else his DNA would 'surely' have been found, is just fanciful thinking. It doesn’t work that way.
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