I think the young agent had never had a guy die in his hands before. I don't think the BAU is really like
Criminal Minds, with the Behavioral Analysists breaking down doors all the time and really being in the front lines. When I think of the real life people who created the real BAU or worked in that department: Robert Ressler, Brad Garrett, (expert consultant now on ABC & CNN news) and Pat Brown, who does the talk show rounds also as an expert consultant, they all look more book learned/desk jockey types than the "going through the door" Derek Morgan types. They probably hung out by the police vans wile the main teams went in, waiting to be consulted on the next step to take.
This show is definitely a psychological mind game between Bacon & Carroll. Some stuff is predictable. But, other parts keep us guessing.