Looks like writers of this show are running out of fresh material so they decided to rehash old stuff and build another episode that centers around painfully boring side stories that don't matter for the main story. This episode was so boring that it hurt to watch. The entire episode consists of Reese and Carter sitting in a car and chitchatting in slow motion for 45 minutes.
I don't blame them for running out of material since it's been 88 episodes but why turn a perfectly good show into a CSI wannabee show just to boost episode numbers? This would have been much better if they went for fewer episodes but packed them with better content instead of making so many filler episodes like this.
Overall this episode doesn't flow, it moves too slowly, too much filler dialogue and too much drama. It's more like a procedural police show than POI. It's also very confusing because storytelling was sacrificed for the sake of shock value. There was no reason for this pitifully terrible episode to exist.