A near tragic story Diver0001 and I think that the DM should have had his cert revoked.
I don't know if this happened or not.
The DM was acquitted of criminal liability by claiming that he believed that his life was in danger and that he fled, leaving the student behind, in order to save his own life. In the Netherlands there is no law saying that you are required to risk death to save the life of another. I don't personally believe that what he said is true. I think when the student ran out of air the DM panicked and bolted and lied about it in court but he was well represented by a smart lawyer and got off with this story. In the civil case he was found guilty and successfully sued.
I also do not know if the agency revoked his cert or not. I do agree with you that allowing him to continue working with students puts more people at risk and that the agency SHOULD have revoked the cert. Maybe they did, maybe they didn't. I never heard. In either case it would surprise me to hear that he went back to DMing again after that. At the scene he collapsed and had to be taken away by ambulance so I assume he was pretty traumatized by what had happened. If he is any kind of man at all he would see what he did and stop working as DM of his own accord.
R..