I got it!
There is also one common denominator, which hasn't been considered........ If it was an alert to the scent of a cadaver scent.
It would have touched clothing, which in turn would touch the wardrobe and most likely the plant on the balcony. it contained some of the chemical elements that make up of cadaverine .......
What do you think it could be?
Until I finish my calculations, I will leave you to ponder the possibilities.
Question: Was Eddie trained not to alert to wee-wee or to other accidents on laundry when in work mode or not? Had his clothing test been used before or not?
As Grime was never asked, no reply was given.
If Eddie was trained to ignore such accidents, ok, but then the next question is why Eddie alerted to two items of clothing: the blue shorts and the red airplaine T-shirt.
No explanation has been given as to why Eddie appears to have reacted to the blue shorts, yet the shorts weren't on the list establsihed or noted by the PJ. The red T-shirt does appear on the list, with no explanation as to the distinction.
Why didn't Grime keep a note of which clothing items corresponded to a correct alert? Or if he had, what did he do with it? If ever there had been a court case, he could have been asked to testify (if such evidence were allowed).