Lieutenant Commander John Der Trihs may be brain-damaged, but he's not a complete idiot.
His uniform is a suit of low-profile, powered-fullerene body armor, and he knows how to use it.
Escaping from behind a set of bars poses no difficulty at all.
Der Trihs! I've posted your bail. Are you ready to get out of here?
He's not a complete idiot, but sometimes he comes close.