Mars heart dropped to the floor when he heard the king's order. He was demanded and pressured in front of all the most important men in the capital to do what his father asked him.
He must ascend the throne and he must also punish the people responsible for killing his mother. In this case, it was obvious that his father wanted him to 'hunt down' Emmelyn.
What King Jared said was true and everyone in the room agreed with him. It was time for the crown prince to take over power now that his father was old and in grief.
If the king was no longer interested in ruling, then, it was the crown prince's responsibility to manage the kingdom. And what the king said about punishing the queen's killer was also true.
Everyone in the room had heard about what happened and knew the main suspect was the woman that the prince had secretly married. It was one big mess.