Your originial ambiguous question, (that means unclear, or vague, or referring vaguely to more than one issue.

)
Charles Bronson the criminal has been in prison for the last decade, in a maximum security environment, how can he possibly have been violent to the public?
If you meant his last decade alive, he is still alive, so his last decade is undetermined.
Charles Bronson, the actor is dead, his last decade alive is very firmly determined, and he was free to roan among the public, and to be violent if he so chose. His film roles were depicitng him as violent.
So your original question regarding Charles Broson, the criminal, was nonsense. It can only have been applied, genuinely to Charles Bronson the actor.
Stupid boy!