More than a quarter century after the kidnapped child was found dead, police in Florida closed the book on one of the country's most famous cold cases, involving Adam Walsh, the son of America's Most Wanted host John Walsh.

Adam, who was 6 in 1981, was abducted from a Hollywood, Fla., shopping mall and his head was discovered two weeks later. His other remains were never recovered.

Police on Tuesday named a convicted serial killer named Ottis Toole, who died in prison in 1996, as the child's suspected murderer.

"It is our determination and conclusion that Ottis Toole was the abductor and murderer of Adam Walsh," said Hollywood Police Chief Chad Wagner. "If [he] were alive today, he would be arrested."

Wagner did not elaborate on any new evidence that the police have uncovered.