Did the dogs contaminate the scene with their own paws?

[John]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

[DCI]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Don't forget the other 8 dogs, in the searches, John.

[John]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Don't forget the other 8 dogs, in the searches, John.

Yes indeed, one has to wonder how many of them were allowed into the McCanns apartment after she was found to be missing?

[DCI]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Don't forget the other 8 dogs, in the searches, John.

Yes indeed, one has to wonder how many of them were allowed into the McCanns apartment after she was found to be missing?

Not sure, but I'd say at least 4 of them.

Sargeant Silva - Dog: Timmy
Officer Cortez - Dog: Sacha
Officer Sousa - Dog: Kolly/Cookie
Officer Rosa - Dog: Oscar
Officer Martins - Dog: Fusco
Officer Fernandes - Dog: Rex/ Zarus

[Luz]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Considering that the dogs signal different materials/residues, I can't see how a contamination was possible. The dogs were taken to the sites directly, they weren't exactly playing on the street or some shabby place. In fact there was a very strict cleaning condition for the place where the materials were disposed outside of the apartment - they had to get a totally new garage, without any contamination from previous cars, which had to be throughouly cleaned up...
I don't see how there could be any contamination by the dogs paws!

[debunker]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Considering that the dogs signal different materials/residues, I can't see how a contamination was possible. The dogs were taken to the sites directly, they weren't exactly playing on the street or some shabby place. In fact there was a very strict cleaning condition for the place where the materials were disposed outside of the apartment - they had to get a totally new garage, without any contamination from previous cars, which had to be throughouly cleaned up...
I don't see how there could be any contamination by the dogs paws!

First rule of forensic science- no-one and nothing enters a scene without leaving something behind or leaves a scene without taking something with it.

That includes dog paws.

[Luz]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Considering that the dogs signal different materials/residues, I can't see how a contamination was possible. The dogs were taken to the sites directly, they weren't exactly playing on the street or some shabby place. In fact there was a very strict cleaning condition for the place where the materials were disposed outside of the apartment - they had to get a totally new garage, without any contamination from previous cars, which had to be throughouly cleaned up...
I don't see how there could be any contamination by the dogs paws!

First rule of forensic science- no-one and nothing enters a scene without leaving something behind or leaves a scene without taking something with it.

That includes dog paws.

So cut the dog's paws.
Ridiculous. You are dealing with high level smelling devices (the dog's noses) not with clumsy humans.

[debunker]

This is something I have always wondered about as these dogs are running around on muck and all sorts every day.  There is nothing to stop cross contamination so if more than one dog is used it is a cert that the second dog must identify that the first dog had already been there.  Personally I find the whole thing rather bizarre!   8-)(--)

Considering that the dogs signal different materials/residues, I can't see how a contamination was possible. The dogs were taken to the sites directly, they weren't exactly playing on the street or some shabby place. In fact there was a very strict cleaning condition for the place where the materials were disposed outside of the apartment - they had to get a totally new garage, without any contamination from previous cars, which had to be throughouly cleaned up...
I don't see how there could be any contamination by the dogs paws!

First rule of forensic science- no-one and nothing enters a scene without leaving something behind or leaves a scene without taking something with it.

That includes dog paws.

So cut the dog's paws.
Ridiculous. You are dealing with high level smelling devices (the dog's noses) not with clumsy humans.

There is a reason why dogs are termed dirty dogs....

[Redblossom]

Dogs trained to find cadavers would be especially likely to be contaminated with cadaver scent themselves I would have thought...?  If not, why not?

Why would ANY dog be used if their findings were routinely contamiinated by them or to them.