" When questioned by them about what he knows, being the last one to see Joey alive, Terry pleads ignorance:I don't know nothin', I ain't seen nothin', I'm not sayin' nothin'.I had never seen him like that before.What is it? What gets into our heads when we see something horrible? A horrible accident on the highway.As he parts, he curses the Lintons for their snobbery, promising to repay them some day for taking Cathy away from him:Cathy: Go on, Heathcliff.] Tibbs also knew that a thermometer would easily determine the "loss of heat from the brain" - one of the best indicators of the amount of time elapsed since death.