Johan van Banchem, was one of the leaders of the lynching of Johan de Witt and Cornelis de Witt on August 20, 1672, he was rewarded for this crime with an appointment as "baljuw" of The Hague by which office of steward, designated a medieval official and then a national leader, William III?
Johan van Banchem:  He was rewarded for this crime with an appointment as "baljuw" of The Hague by Stadtholder William III. Stadtholder: In the Low Countries, stadtholder (Dutch: "stadhouder" , ] ), is an office of steward, designated a medieval official and then a national leader.
Stadtholder