MADELEINE'S DNA - definitive study.

[Robittybob1]

Rob, the word blood is absent from the whole of John Lowe's report.

Grime claims Keela could detect blood in traces so minute, they wouldn't trace it in a laboratory. 

How would Grime know?

Does he really say "laboratory" or what I remember "scene examination"?    Do you know the actual quote you were thinking of?

[Mr Gray]

However much is needed.
If, for the sake of argument, the laboratory can detect blood at a level of 5 parts per million, ( or whatever unit you might prefer), the task would be to see if a dog gave a positive response at level below thatm compared with known zero level.

I doubt very much the dog can detect such tiny amounts of blood in an aqueous solution......based on how the dog detects a scent

[jassi]

That, of course, is merely your dogmatic opinion.
The discussion was how one could test the claim, not what the actual  detection level might be.

[ShiningInLuz]

I doubt very much the dog can detect such tiny amounts of blood in an aqueous solution......based on how the dog detects a scent

So the reason they deploy dogs over reservoirs is ....... what?

[misty]

Keela only alerted to dried blood. How would an aqueous solution work?

[Mr Gray]

So the reason they deploy dogs over reservoirs is ....... what?

because they are looking for a great big dead body that is giving off tons and tons of scent....it really is as simple as that

[Mr Gray]

That, of course, is merely your dogmatic opinion.
The discussion was how one could test the claim, not what the actual  detection level might be.

based on an understanding of the principles of scent detection......judging by the responses i do seem to have a much better understanding than other posters. Have a think about how dogs detect scent and you might start to understand

[Mr Gray]

Keela only alerted to dried blood. How would an aqueous solution work?

I'm sure sil and jassi will explain it to you

[ShiningInLuz]

Keela only alerted to dried blood. How would an aqueous solution work?

Perhaps your knowledge is better than mine.  But isn't there a video somewhere in which Grime makes a tiny pin-prick on his finger, stuffs a piece of bl**dy rag into a wall, and Keela alerts to it?

Roughly speaking, I am asking if the blood needs to be dried for Keela to alert.

[jassi]

So you could put a certain volume on a filter paper ( for example, or a cuddlecat) and allow it to dry.
I'm sure the forensic scientists conducting the tests would select the appropriate conditions for the test.

[ShiningInLuz]

because they are looking for a great big dead body that is giving off tons and tons of scent....it really is as simple as that

A Madeleine-sized-body in a reservoir?  You are joking, I hope.

[jassi]

Keela only alerted to dried blood. How would an aqueous solution work?

You suggesting the dog would walk right passed a pool of  liquid blood?

[Mr Gray]

A Madeleine-sized-body in a reservoir?  You are joking, I hope.

compared to a few molesules of blood we are referring too a body the size of maddie would be giving off tons and tons of scent....you need to undestand how scent is detected

[Mr Gray]

You suggesting the dog would walk right passed a pool of  liquid blood?

a pool of liquid blood woiuld be giving off a lot of scent.....a very dilute solution may give off none

[Mr Gray]

So you could put a certain volume on a filter paper ( for example, or a cuddlecat) and allow it to dry.
I'm sure the forensic scientists conducting the tests would select the appropriate conditions for the test.

if the solution was so diliute it would be uncertain if you had any blood cells in your sample