I don't believe it was semantics. Grimes conducted his work with the dogs, in this case, with great professionalism and claims that he somehow encouraged alerts are just clutching at straws in my opinion. The alerts by both Eddie and Keela (and the facts about where they did and did not alert) are highly suggestive that a dead body was present in apartment 5A and that bodily fluids from a dead body were present in the McCann's hire car and on some items of clothing belonging to the McCanns. Forensic testing of these human bodily fluids was not conclusive as to the origin but they did contain 15 DNA markers in common with Madeleine (which I know is not conclusive). Furthermore some of the samples collected for forensic examination contained DNA from more than one source which complicates things further.
If you press Chat GPT enough with very pointed questions, you get it to proffer a pointed answer:
While the specific names or details of the 15 DNA markers matched to Madeleine McCann have not been publicly released in full by authorities, forensic DNA testing typically includes the analysis of 15 or more STR markers to establish an individual's DNA profile. The more markers that are matched, the higher the probability of identifying the individual, and a match at 15 markers would be statistically significant.
In general, the 15 STR markers would have been selected for their ability to distinguish individuals, and a match at those loci would have suggested that the bodily fluids found in the apartment were very likely to belong to Madeleine McCann—or at least that there was a strong genetic link. However, the match was not considered conclusive by the investigators, because mitochondrial DNA and other factors (like the possibility of contamination) complicated the interpretation.