Watch this carefully. Three officers are backing away, keeping distance, speaking calmly, trying to slow things down. And for a moment, it looks like it's working. Then, a fourth officer arrives. Sirens, commands, and within seconds, shots are fired. Now, that officer has been fired. But, here's the problem. Some say the situation was under control. Others say it was still a deadly threat. So, what changed? Thin blue lies, baby.