Well, it's kind of weird because of course, Mum wanted him to be an Auror, so he could catch enemies of the Protectorate, but he went into Healing instead. But because he was doing this responders' rotation, see, he got to help figure out how they were killed.

He's not really in charge of finding out who killed them, though, but he might be important to help send them to prison if they're caught.