[OldHarbor]

It looks as though it was the weapon in question.

From a local tv station , Gun goes off in elementary school classroom in Charles County

Not an expert, but I find it improbable that the gun “went off” without Junior having pulled the trigger..

[HartleyMBaldwin]

I find it improbable that the gun “went off” without Junior having pulled the trigger

Happens all the time. Just ask Alec Baldwin.