Shooting someone yourself is intentional homicide.
Really it's ridiculous to me that some people are blaming someone else for an incompetent trigger-happy cop.
Throwing out my own analogy, it's like someone prank calling a hospital to tell them they have cancer, then a doctor killing them with chemo without doing any tests to verify they actually have it.
At some point you have to hold trusted professionals responsible for actually doing their jobs properly.
Presumably then capital punishment, itself an example of intentional homicide, is among these "exceptional" circumstances?
I'm just pointing clarifying that, in your moral system, capital punishment must be one of the exceptions - it's obviously a form of intentional homicide, so you make an exception, right?
Just be careful with handing out such exceptions!