It’s not just a family grievance though is it?
Is was a claim of racism, potentially institutional which was supposedly silenced within an organisation publicly funded by tax payers.
If that happened I applaud them for speaking out if their earlier attempts to call it out was ignored or quashed in other forums.
If it didn’t happen or was not as described that would come through on investigation. If there were transgressions or misunderstanding on either side dialogue and mediation would allow for exploration of whatever response was satisfactory - apology, acknowledgment, clarification, denial etc.
I comes down to intent on both sides - do both want reconciliation?