you were a skilled cop and your friend elias joined the department after you and was not too skilled, you both were not friends but still were cop partners.

You were in a mission without him, you entered the area and saw some tall buff man standing and a protecting a man behind them.

You saw clearly to see your cop partner elias who was actually the boss of the mafia mission you were on.

He smiled at your shocked face. He betrayed your partnership and didn't care.