An excellent idea. Justice Bao in ancient China showed no fear or favour in arresting anyone including Royalty apart from the Emperor. The power to arrest a noble makes playing a judge very appealing. If someone is found innocent he can then be released. If not then mete out a punishment. If he abuses his powers he can always be protested out.
On the choice to go willingly or not - yes, yes, yes! To balance things out.
Maybe we can finally have the judges power in accordance with that whole weak/strong/medium thing the ruler gets to decide. Strong judges can arrest people
