KNOXVILLE, Tenn. (AP) - Police in Tennessee say a woman whose body was found along a road in 1975 was likely the victim of a serial killer who may have had 90 victims.

Martha Cunningham's death was considered to be from natural causes at the time. But now Cunningham is one of dozens of murder victims that Samuel Little has described to investigators.

The News Sentinel reports David Davenport, a cold case investigator with the Knox County Sheriff's Office, has identified who Little called "Martha." The Knoxville mother's body was found in a wooded area in eastern Knox County in 1975.

Cunningham's sister, Jessie Lane Downs, says she never believed her sister died of natural causes.

FBI experts say Little may prove to be one of the most prolific serial killers in U.S. history.

Information from: Knoxville News Sentinel, http://www.knoxnews.com

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