This is the safety protocol I would expect. Sounds like a few people screwed up.
The protocol for dummy rounds, which can’t be distinguished visually, is to point the gun at the ground, away from any person, and pull the trigger (or in the case of an SSA, cock the hammer and pull the trigger,) as many times as there are cylinders.
And a couple more times for good measure.
Had that been done with the gun in question, any live round would have been revealed before a dangerous situation occurred.
Sounds like maybe someone swapped the gun. A lot of checks get bypassed, and it’s time to start looking at deliberate action.
Safety protocols probably aren’t designed to stop a sabature.
They were talking about the possibility that the live round was inserted deliberately by “X”.