I'll admit that when a hold-up mob is brought into court with faces bandaged, it can be assumed that all of them didn't fall down stairs or roll off a cell bunk, accidentally. But neither does the hold-up man or the gun pull his trigger accidentally."
I will concede that in court, if a hold-up group has their faces obscured, we can infer they didn't stumble down staircases or fall from cell bunks by chance. However, neither the hold-up person nor the one pulling the trigger does so unintentionally.