I saw the official caution "Anything you say will be used in evidence against you," actually hovering on Summerhaye's lips. 
Summerhaye's lips were flat and still; he had nothing to say.
mnli hypothesis: Summerhaye's lips were flat and still; he had nothing to say. premise: I saw the official caution "Anything you say will be used in evidence against you," actually hovering on Summerhaye's lips. 