1. Looking only at this situation, Mader made the right decision which, if not for the other officers, would have saved the suspect's life. Looking only at this situation, I think we can agree that Mader's actions were correct, and the protocol is wrong.

2. Looking at the bigger picture, Mader made a decision which has bearing on a highly relevant random variable (whether he survives his career). But there is another highly relevant random variable: whether or not Williams, the suspect, survives the encounter. And during his career, Mader would make this decision hundreds of times with hundreds of suspects. I have no objection to valuing an officer's life over a suspect's, but even with that weighted valuation, it's hard to make the claim that a difference in the probability of Mader's surviving his career is worth him being required to leave a swath of dead bodies in his wake.

It's an extraordinary claim that every police officer killing every suspect with a gun they encounter is a better result than simply letting the police officers make the decision themselves. The police have the most at stake (their own lives and whether they've taken another person's life) so they have the right to make their own decisions on how to handle a situation. The police in a situation also have the most information about that situation. Even looking at the big picture, I still think that Mader's actions were correct, and the protocol is wrong.

EDIT: It's a bit disingenuous to approach this as if your stance is based in caring for the well-being of the police. This isn't a situation where you're defending an officer. Remember, you're defending someone sitting behind a desk firing a police officer who risked his life to save someone else's. Let's keep that in perspective.