The problem with the Remington 700s was that the triggers had been adjusted to about 3 ounces of pull and would go off with little urging.
The 'news' program was saying that camming the bolt home causes the firing pin to set off the primer on some 700s. I bet that was caused by a dirty bolt face and/or sear and/or firing pin. But even so: why was the muzzle covering something (her son) the woman wasn't willing to destroy. Basic. Gun. Safety. Violation.