Scott's Team
Scott doesn't really like to bullshit, never has and never will. He would have made sure that he had all of his team gathered before letting them know who it was that was killed (Scotty and Darcy) and also given them the particulars of how.
This would mean that the team would be aware of how Cassidy was affected and how he would at this time need their support in whatever way that it can be offered.
His team would know it was Clem whose powers had gotten out of control but that it was an accident, she hadn't meant to do what she did and there's nobody that regrets it more than Clem right now. He'd also point out that this is no time for finger pointing or laying of blame especially if you're not directly involved so would state very clearly that there was to be no stirring the pot or poking the bear. If he was to find anybody doing any of that? He'd assure them that there would be consequences. In addition to that he would reassure them that steps and measures have been put in place, to stop this from happening again and all those who need to know about what happened have been informed.
He'd also tell them that they need to come to him the moment they feel something isn't right with them or their powers, the sooner he knows the sooner he can do something about it. And it doesn't matter if you hate them or don't believe in it he would tell each and every one of them that he will be referring them to the psychiatrists and that his door is always open.
Cassidy however he would then take aside and ask him privately what he could do to help and offer him whatever support he needed as well as asking if there was anything he would want to do, to honour his fallen friend.