I stated this PoV in my initial post on the topic.

Did the decedent's firearm go off as the officer removed it turned with it in hand.

My understanding is that particular weapon has a twitchy trigger, meaning slight top of barrel touch and the weapon can discharge.

IMO it was handled with care, so its not negligent discharge, its an accidental accidental (gun defect).

Some lawyers have mentioned SIG might be culpable in this case.