This incident made him recall the day, Frederick was taken hostage by his enemies. To get the information on the new weapon he was making they had tortured Frederick without mercy.
Frederick was in their custody for three days and during those three days, he never uttered anything concerning the new weapons to them.
Vincent knows that in this kind of business he deals in, nobody could be trusted. Just to save their heads employees betrayed their masters that is why this single act of his had earned his admiration. He had thought that he was a rare gem that is why he made him the head of his security guards.
Since he has made Frederick the head of his security guards he has never regretted his choice and he was sure he won't regret his choice even in the future.
