^^ rsbm
Actually, the prosecution gave up the dog handler as their witness in advance (the prosecution confessed the motion prohibiting Spence from being qualified as an expert witness).
After learning the prosecution would not be using the dog handler, the defense pounced and wants to call the dog handler as a witness (not as expert) and the Court granted this to the defense. And we saw a preview of how the defense will use him -- Iris taking his words out of context and asserting SM's scent was in the woods where the bike was recovered ...
ETA: The defense preview as described by LS recap video.
It’s a clever witness flip by the Defense. It sounds like some weakness were exposed during his testimony (report, no report, but wasn’t asked, I didn’t write it, those weren’t my exact words, frustration on the stand). IMO