memories fade, evidence is lost, witnesses die. but time can also put evidence in a new light. such was the case in the trial of stephen scharf, accused of killing his wife nearly two decades ago. >> there is no statute of limitations on murder. >> the prosecutor promised the evidence would tell a story as simple as it was brutal. a husband determined to avoid a costly divorce lured his wife to the edge of a cliff and forced her off it. >> if he has lied, he is guilty. >> the state marshaled some familiar facts to tell its story, starting with the crime scene where the prosecutor said the cliffs showed no sign of an accidental tumble. >> no debris, no blood, no hair, no tissue. >> then there was the husband himself, cool and collected in