You're whole stance in this thread is based on "assumptions" of what we "feel". You're way off base on this and I pray to God that you are NOT an LEO.
It doesn't MATTER what they did at this point, he's caught in a possible lie. If you confuse a stun gun with a duty weapon, WTSHTF, you are in the wrong profession. END OF STORY.
I'm done with this one, it's "excessive force" backed by "lies and mistakes". He'll go to prison and rightly so.