unless of course, it was unjust. Then it is a legal issue and there is legal recourse. :erm:
You can't just fire people, you have to "prove dem things"
Which is why they were subject to a disciplinary hearing, which in cases like these is chaired by an external expert who hears evidence and statements from both sides and witnesses and makes a ruling. They didn't just fire them Willy-nilly. The only case they'd have is if they erred in a technical aspect of the hearing, like incorrect notices or misconduct during the hearing. What they did seriously brought their employer's name into disrepute and broke down the trust. Both are dismissable offences in and of themselves...