Originally Posted by TheDoc

Cops aren't here to judge you, that's the courts job. They do take into consideration if you're the correct person or not, in this situation this was the guy, without question.

You watched 30 seconds of a full day event and didn't see him threaten them... technically speaking, it makes no difference who you threaten, even yourself.

Deadly force doesn't always mean you have to kill them. It's about stopping the situation, when nothing else is working. It can be used when a person is running that 'could' cause harm to another person - and this is a prime example of when it should have been used.