In an article, the court dismissed the claim for the death of an employee as it is found that the employer did everything it can do to impart knowledge, train, issue PPE, conduct weekly meetings and toolbox meetings and so on.
Still, I feel effective supervision and not engaging the person when the employee refuses to wear PPE could have prevented such incident. Otherwise, why to engage supervisors. Apart from supervisors for safe production activities, site specific monitoring of safety supervision by designated persons will ensure accident prevention.