Yes I appreciate that but the potential for contamination still exists.
In order to rule out contamination it would be necessary to carry out a complete audit on all fixtures, fittings and contents.
The odour is highly transferable by way of items from one place to another. It clearly lingers and is highly transferable as per the police report into the case of Shannon Matthews.
I bet if those mutts were let lose in charity shops, containing a lot of second hand items from the deceased, they would go ballistic.
I often take items into those places and hold my breath while doing so as the stench makes me want to heave: the scent of death 
To believe that you’d have to also believe that Murat’s and all the other apartments that Eddie visited but didn’t alert in were devoid of second hand furniture or had a connection to someone who had died.
So Eddie, wrongly, alerted in the only apartment with second hand furniture, that had a connection to a dead person and that a child, now feared dead, had disappeared from ? Is that really what you believe ?