Information for this type of article comes from the information released by HPD to the press. That's where the language comes from.  An explanation for the terminology is found in the Hawaii Revised Statutes (HRS). HRS is readily available online for anyone who wishes further clarification. (btw: A suspect may be held up to 48 hrs without charges and then must be charged, released without charges, or released pending investigation. It all has to do with the investigative process of putting a case together that will be accepted by the Office of the Prosecuting Attorney.)