This is not an Accident. Unless the Gun fired ALL BY Itself It is RECKLESS ENDANGERMENT!!
If he is a sub-standard individual who thought he was acting properly, it wasn’t consciously reckless endangerment.
It was improper procedure to be sure.
I doubt he thought he was doing anything wrong. Something startled him, or he bumped something, or he took a mis-step, and the weapon was fired.
I believer there were a number of contributing factors that resulted in this accidental shooting.
I’ll bet this wasn’t the first time this guy used this same procedure. It should have been observed and corrected prior to this. If that’s the case, it could easily not be this officer’s total fault.
Someone has died. Our first reaction is to want justice for it. An idiot doing things wrong, possibly not even knowing they were wrong, is not necessarily the bad guy everyone will think him to be.
This is one of those times when you shake your head. It’s a tragic loss.