I was watching the show COPS a few weeks ago, and I saw this guy that had been robbed at gunpoint and shot the robber, killing him at the scene. Before the cops even arrived, the dispatched officer said something along the lines of "just another citizen taking the law into their own hands" like he had done something terribly wrong. They furthered their point on arrival, like he should've done nothing and called the police. Then, they took his gun away as evidence. I was wondering why some police are like this, and are they required to give the gun back after a shooting like this? What is the time period of getting it back usually?