Studies were done.....found to be present up until 14 months, in that particular study anyway, as we know, there arent many to chose from but think we can conclude it is not true it lasts no longer than one month...
http://www.csst.org/
Articles of interest, residual scent in buildings
there was also the carpet squares study remember? over 65 days IIRC with a high success rate
http://www.pawsoflife.org/Library/HRD/Oesterhelweg%201998.pdf
Thanks.
I'd agree with Gilet on the first study, and for the same reasons.
I'm aware of the carpet squares experiment. However, I would find it risky to make any assumptions in terms of Eddie's reactions in PdL.
- Even though the time required for cross-contamination was short and the smell could be detected with a reasonably high rate of accuracy over a period of 65 days in scientific conditions (and for longer in informal conditions), there would seem to be conditions for which there is no evidence to suggest that they applied in PdL.
- The experiment involved carpet squares, i.e., porous material. Eddie did not react to porous material in 5A. Clothes (whichever they actually were) and Cuddlecat (which he initially didn't bark at) from the villa can have other other explanations.
- The control was to use carpet squares absorbing the natural body scent of living humans. The scope did not involve investigating the cross-contamination scent of decomposing substances from a living person.
- By the time they had placed the carpet squares under the bodies, they had been dead for around 2.5 hours.
- The experiment was conducted to avoid contamination, which clearly wasn't the case in PdL.
Therefore, while there is reasonable accuracy in controlled conditions over that period of time, it does not equate to any conditions that I'm aware of in PdL.