They should all be put under disciplinary measures then, gross misconduct springs to mind. Why gross misconduct you may ask, surely putting someone's life in danger during the course of your work puts it in that bracket?
Nah, just sack the idiots and tell them to whistle for their pensions, etc.
Then when they're on their way out the door, have the fuzz waiting for them. I'm sure that some charges or others would be able to make stick.