In 2011, the Department of Justice released portions of a memo explaining why it is (in their eyes) perfectly legal for the President of the United States to order the execution of US citizens without an arrest warrant, the assistance of counsel, or a trial.
It didn't matter much; the citizen in question was already on a US government "kill list."
Our government has a "kill list."
The government also killed that citizen's teenage son, but said it was an 'accident.'
The government apologized.
The author of the memo now sits on a federal appeals court.