"Yo...you!"
The old man could not bring himself to speak any more, the only thing clicked in his brain was that perhaps Renna was running away from the mafia king.
Indeed, it was impossible to escape from his clutches and if the lady had stirred a trouble with the underworld Lord, then it was better to stay back.
The old man calculated the things knowing that the great Ronan Ross had never done injustice, he was not responsible for anything related to Renna. Thus, the old man was sure that he and his family would not suffer at his hands.
But he was having the opportunity to shout while he remained quiet, a weak man you must have concluded?
I would say he took the wise decision, acknowledging that he 'might' slip away from the approaching ruckus. It was just a single night and with the next sunrise she would be gone, nothing would happen till then, right?