Jack knows about the recent car accident and the exact situation in which Crown prince and little princess are. It was due to great luck and blessings of ancestors that truck wasn't at its full speed. Otherwise with car brakes' failed, injuries could have been much more serious and there can even be chances of loss of lives. They couldn't even dream of the consequences if something much more serious could have happened to the sun and moon of the empire, while the vile traitor Jack Walton is eyeing the throne.
"we have checked the situation Your, Majesty. " It was indeed Jack Walton who was manipulating the car accident from behind the scenes. It was his intention to worse - kill the two little heirs or at least to cause some serious injuries to them. There were his people behind the sudden error in car brakes. It needs to mention car was personally checked in the morning as little highnesses were going to travel. All preparations were done and all sort of precautions were taken but still we weren't able to avoid accident. William starts reporting situation to Sam once he enters through the door so that His Majesty can be assured of the big decision he is going to take. After all, sending little Crown prince away to another family so that he can safely grow up and telling the whole world about death of the heir to the throne is a very big deal whose consequences has to be paid in large amounts. An empire without a heir is weakest.
((NOTE:- JACK WALTON AND JACK MADDOX ARE TWO DIFFERENT PEOPLE. PLEASE DON'T GET CONFUSED.)) THANK YOU!