I have to agree with this after being involved with a fatality as an official. The family (and myself) benefitted from being able to discuss things. I was hesitant at first but a psychologist I went to see for support suggested writing my thoughts on a condolence card as a starter with my contact details included. The family appreciated the opportunity to talk further.
It is really important that people are not pushed into discussing detail of the "incident" if they do not want to. If you want to talk, talk with someone you trust when you are ready.
2cents.
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