[Serious] If being armed with a gun is a constitutional right in America, then why is being armed a valid reason for police to shoot someone?

I actually just asked a similar question on this post of the Ryan Whitaker incident. He answered his door holding a gun, and while trying to put it down was shot. He died, and as far as I can tell, the officers involved have never been charged. At least the change.org petition still says they haven't been charged.

I guess I'm confused at why killing him for being armed was okay in this instance?

/r/AskReddit Thread Parent