Tasers were not designed for compliance. They were designed as an alternative to deadly force alone. To say you would tase him is to say without the taser you would shoot him dead.
You believe the man was amenable to reason at that point in time, knowing that he had failed to get his child out of the house and had inadvertently left him in there? I don’t think he was at all. I think he would have done whatever it took to go back in and would not have cared a whit for his own safety. Chance or no chance, he would have seen dying there preferable to survival.
Which means that he’s not capable of properly assessing the situation in such a way that he had a chance to actually succeed.
The problem is this - he has a son and a wife and what is left of the remainder of his family. He still has obligations to them as well. Is it right for him to throw away those responsibilities?