I believe that you are all correct in a sense….
Keela was pretty accurate and Eddie was also on the blood alerts.
Apart from that, the only evidence that I can see…. is that either
a. Eddie was wrong and it was a false alert
or
b. That there was actually a body there at some time.
Neither of the possibilities above have been corroborated with any other evidence, hence no corroborated evidence to date.
Unless a confession is obtained at some stage, stating that a body was left in the master bedroom for some time and contaminated clothing with a scent that lasted 3 months, the situation regarding evidence is unlikely to change. IMO
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My professional opinion as regards to the EVRD's alert indications is that it is
suggestive that this is 'cadaver scent' contaminant. This does not however
suggest a motive or suspect as cross contamination could be as a result of a
number of given scenarios and in any event no evidential or intelligence
reliability can be made from these alerts unless they can be confirmed with
corroborating evidence.
http://www.mccannpjfiles.co.uk/PJ/MARTIN_GRIMES.htm