Sniffer Dogs can hinder police work.

[Lace]

Unfortunately though Anne if you can smell it then a dog will definitely smell it,  ANY DOG,  the problem being what is a cadaver dog smelling when there is no body? 

How long before a dog can smell cadaver odour?   

[TTSOFAFM]

Cadaverine and putrescine are known to be found in all decaying
organic matter and have also been found in human saliva.  Also, these mixtures likely
do not completely represent the entire odor picture of human remains as there have been
no scientific studies showing which odor or combinations of odors are of interest to HRD
canines.
This is likely why the HRD dog wasn't trained with synthetic compound of cadaverine and putrescine and didn't react to it.
If one is patient enough and reads further, it says that both particular scents aren't present in early decaying stage (which in fact confirms human noses).

That paragraph speaks of Pseudo scents which can be used to train dogs, but the part I enlarged states cadaverine and putrescine are known to be found in all decaying organic matter and have also been found in human saliva.

It does not state Pseudo cadaverine and putrescine scents....... blah blah blah

So twisting words again and taking them out of context to suit agenda springs to mind here.

[AnneGuedes]

Et patati et patata.

[AnneGuedes]

Unfortunately though Anne if you can smell it then a dog will definitely smell it,  ANY DOG,  the problem being what is a cadaver dog smelling when there is no body? 

How long before a dog can smell cadaver odour?

It takes many hours before a body smells death enough for a human nose to detect. But I never smelt it in sanitary towels, bandages, sperm, baby bibs, etc., all sorts of things that have a scent, but not the scent of death (fortunately).

[TTSOFAFM]

Et patati et patata.

Just a shame you can't accept that I am correct and you are wrong without having to resort to such petty postings.

[AnneGuedes]

I was just answering your blahblahblah !
I see you've no intellectual interest for this study ! A pity.

[Lace]

It takes many hours before a body smells death enough for a human nose to detect. But I never smelt it in sanitary towels, bandages, sperm, baby bibs, etc., all sorts of things that have a scent, but not the scent of death (fortunately).

The way I would look at it though Anne,  and I really know nothing about cadaver dogs,  but what they smell has to be a mixture of things decomposing in the body.   So,  if  a cadaver dog can smell dried blood for example and alert to it,  then surely it would be in the smell of a sanitary towel?

[AnneGuedes]

The way I would look at it though Anne,  and I really know nothing about cadaver dogs,  but what they smell has to be a mixture of things decomposing in the body.   So,  if  a cadaver dog can smell dried blood for example and alert to it,  then surely it would be in the smell of a sanitary towel?

Interesting question, but my experience is that sanitary towels don't smell death (old ones ?). That blood, as you know, isn't exactly like the blood that flows from a wound. Would a HRD dog alert to it though the training was with "fresh" blood ?
In recent post-mortem, the HRD dog smells a subtle scent that we don't detect. How long that scent remains depends on various factors, some experiences have been made, yet not enough.

[Mr Gray]

Eddie alerted to the flowerbed...it was outside....the scent doesn't last that long
The whole evidence would be thrown out...if it was ever presented..

[stephen25000]

Eddie alerted to the flowerbed...it was outside....the scent doesn't last that long
The whole evidence would be thrown out...if it was ever presented..

How long does the 'scent' last for exactly ?

[Mr Gray]

How long does the 'scent' last for exactly ?

That's the whole point Stephen but you won't like it
There are hundreds of thousands of scientific articles re DNA and fingerprints...but the experts still argue
From the little information in a totally confined space the scent could last one year
Out in the open...who knows
Of course if a body part was still there it's different

[stephen25000]

That's the whole point Stephen but you won't like it
There are hundreds of thousands of scientific articles re DNA and fingerprints...but the experts still argue
From the little information in a totally confined space the scent could last one year
Out in the open...who knows
Of course if a body part was still there it's different

I am quite aware that there are many variables in play, in terms of how long after contamination and the degree of contamination. a scent or scents can be detected. Also, you have to include which type of dogs are used, i.e. some are better for this than others in detection.

However, to  say, 'the scent doesn't last that long'  is far too vague and meaningless.

[Mr Gray]

The whole point is that there is no evidence to back up the dogs abilities
Grime has already stated that the dogs alert cannot be relied on without forensics
Isn't that plain enough

[Lace]

Interesting question, but my experience is that sanitary towels don't smell death (old ones ?). That blood, as you know, isn't exactly like the blood that flows from a wound. Would a HRD dog alert to it though the training was with "fresh" blood ?
In recent post-mortem, the HRD dog smells a subtle scent that we don't detect. How long that scent remains depends on various factors, some experiences have been made, yet not enough.

The reason I mentioned that Anne is I remember reading an article where a cadaver dog was searching for a dead body and alerted to inside a shed.    After investigation though they found that the dog was alerting to an old sanitary towel.

I will try and find the article for you to read.

[Mr Gray]

I am quite aware that there are many variables in play, in terms of how long after contamination and the degree of contamination. a scent or scents can be detected. Also, you have to include which type of dogs are used, i.e. some are better for this than others in detection.

However, to  say, 'the scent doesn't last that long'  is far too vague and meaningless.

The prosecution has to prove the case...the mccanns don't have to prove anything which may come as a shock to the Portuguese.....vague and meaningless...exactly the right words to describe the dogs alerts