HOLLYWOOD, Fla. — A little boy's murder that shocked parents everywhere, launched a national television crusade and confounded detectives for more than two decades may finally be solved. Hollywood police today are expected to identify Ottis Toole as the killer of Adam Walsh, the 6-year old snatched from a Sears store at the Hollywood Mall on July 27, 1981. Adam's severed head turned up two weeks later in Vero Beach and his body has never been found.