Evan's Team
Evan's a marine and first and foremost this means he's a fairly pragmatic man which means you can expect him to deliver the news in a truthful matter of fact way with no ramping up of drama or making it over the top.
The names of who died would be given as would the name of the person who was responsible for their deaths but with the clear indication that it was not intended, hadn't meant for it to happen, and it is nothing short of a tragic accident. It should have been avoided but it wasn't so there isn't much that can be done except to make sure it never happens again which has been done.
He'd ask his team to be calm, rational and adult about this whole thing, and not to indulge in idle chit-chat or gossip because there's a lot of grieving people right now and the last thing they need is somebody involved in business that isn't theirs to be involved in. He would encourage any of them to come to him if they need help in any shape or form, be it with their powers or this situation in general. Referrals if needed to the psychiatrists can and will be made, he just needs to know, but if somebody doesn't say anything and he thinks it needs to happen he will refer anyways.
He'd encourage questions and express that the lines of communication are open so not to shy away and speak up.
Orla he would check on separately and ask her what she needed from him in order to work through and process everything that happened.