WAS HE A LOVING, PROTECTIVE HUSBAND? OR A COLD, CALCULATING KILLER?TV's 48 Hours Mystery unravels the lethal secrets inside a seemingly perfect marriage -- and behind a chilling double homicide."My wife is dying on the floor! Please, please come help!" The frantic 911 call sent emergency units racing to a tidy brick home in suburban Springfield, Illinois. Beautiful, vivacious Donnah Winger had been bludgeoned to death by a male intruder; her attacker was fatally shot by Donnah's husband, Mark. In the aftermath of the horrific home invasion, family and friends rallied around Mark, a wellliked and respected nuclear scientist, and the infant daughter he and Donnah had just adopted; some even called him a hero. But one rookie detective didn't buy Mark Winger's version of the grisly events of that August afternoon. After four years of relentless investigation, a closed case is reopened, and fragments of truth -- including shocking new witness testimony -- come together to reveal how Mark Winger turned a chance meeting with a troubled young man into the almost seamless killing of his own wife, with an Invitation To A Murder.