Two things 1) Never set the standard by LEOs.  Even my cop buddies will agree to that.   2) You are referring to NEGLIGENT discharges.    What I said earlier in the thread still stands,  keep the weapon holstered with the trigger guard covered and when not holstered,  keep your finger off the freakin trigger.   I guarantee that of all those reports of ND's by LEO's that you mention,  98% are covered by breaking the finger off the trigger rule. If you can't follow that one simple safety rule, then yes, there is a pretty good likilhood of having an ND.  However, carrying unchambered is not the fix, following the rule is.  If you can't follow the rule, don't carry.