[dheretic]

The state can already kill you without a trial. The state can kill you for whatever reason it desires to already. The state has an absolute control over the "justice system" and it can decide what to prosecute and what not to. It would only be by the good graces of the state or the fear of a popular revolution that if your killer was retained by the state that he/she would be prosecuted for anything. So your argument doesn't work.

[Lucius Cornelius Sulla]

The state can already kill you without a trial. The state can kill you for whatever reason it desires to already.

Not without any kind of a hearing it can't. If someone acting in the name of the state does so, say a police officer, they are subject to arrest.