Jeffrey Dahmer, Adam Walsh

Jeffrey Dahmer, Adam Walsh (Getty Images)

MIAMI -- One of the most infamous murder cases in U.S. history is being linked to notorious serial killer Jeffrey Dahmer.

An investigation by the Miami Herald is raising serious questions about the man police say murdered 6-year old Adam Walsh in 1981.

According to the Miami Herald, not only was Dahmer in South Florida at the time Walsh was kidnapped from a Hollywood, Florida shopping mall, there was mounting evidence linking the killer to Walsh.

The evidence includes witnesses who said they saw Dahmer at the mall with Adam that day, one who says he saw Dahmer throw a crying boy into the back of a blue van as well as people who say Dahmer had access to a blue van fitting an early description of the getaway vehicle.

Adam's body was never recovered.

But a severed head identified as Adam's was found Aug. 10, 1981 in a canal on the northbound side of the Florida Turnpike near mile marker 130.

In 1991, Dahmer emerged as one of the nation's most infamous killers after his arrest on charges involving decapitation, necrophilia and cannibalism.

He had 11 severed heads in his Milwaukee apartment.

Dahmer was killed in prison in 1994.

In December 2008, police named deceased drifter Ottis Toole as Adam's killer.

However, he was never officially charged with the boy's murder.

Twice, Toole confessed to killing Adam. But in both instances he later recanted.

Adam's father, John Walsh, later became the host of TV's "America's Most Wanted" and worked to create legislation that led to the Missing Children Act of 1982 and the Missing Children's Assistance Act of 1984.