You have been doing your homework, Misty
Nylon and plastic contain :-
Putriscine 4 carbon atoms in chain between amines, which is chemically similar cadaverine 5 carbon atoms between amines ends, as they are both Diamines with a short hydrocarbon chains with primary amines group either end
=Methane + Putriscine diamines are two main ingredients of cadaverine
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Now add polystyrene (C8H8)n
I must confess I used this article as a guide.
http://www.independent.co.uk/news/science/the-csi-death-dogs-sniffing-out-the-truth-behind-the-crimescene-canines-835047.htmlThis part was interesting:-
A human cadaver dog's detection skills depend greatly on its training, and the problem is that human remains are hard to come by. Trainers often use a combination of available "pseudoscents", and pigs. The problem with pseudoscents, says Mick Swindells, a retired police handler who works as a freelance trainer and handler in Blackpool, is that they represent a "snapshot" of death.
As decomposition proceeds, the chemistry of the corpse evolves, causing its odour to change. "I'm trying to train a dog to find the whole video, not just a snapshot," he says. Pigs decompose in similarly to humans, and when buried they disturb the ground in a similar way.
as was this part:-
On another occasion, Swindells and one of his dogs were searching a house when the dog signalled. A cache of bones was found beneath the floorboards at the spot – but they were later identified as pig. Pig carcasses are used in training cadaver dogs. But why would anybody hide a dead pig? The dating of the bones gave a clue: they had probably been buried during the Second World War, when pork was rationed and penalties for dabbling in the black market were severe.
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But back to the clothing. Why, if something suspicious was detected, were no further tests apparently carried out?
There may have been soil traces on the trousers, or other forensics. Why did Amaral not follow this up immediately, in light of his mantra that "every contact leaves a trace"?