Sentence:  Captain Sulu, who served under the legendary James T. Kirk for many years, disobeys Starfleet orders in order to try and help Kirk and another old shipmate, Dr. McCoy, who have been imprisoned for the <WSD>murder</WSD> of the Klingon chancellor. 
Meaning of the word marked with <WSD> tags:  An act of deliberate killing of another being, especially a human.