wade is a workaholic fbi agent that thinks he knows everything
peter is a crime scene photographer, wade once implied that anybody could do peter’s job, so peter decided he was going to be better than wade at his job, and he thinks one uping wade is hilarious, so in his free time he ends up pouring over case files and studying up on things like blood spatter analysis
peter ends up being the one that notices all the little details or whips out some knowledge on a monumentally old and forgotten case that cracks the one they’re working on wide open
and wade, just, fucking hates him