CLEVELAND -- Investigators will soon be using new science to solve one of Cleveland's oldest murder mysteries, according to NewsChannel5.

At the suggestion of a Mark Stone, a producer-director from nearby Lakewood, police will see if DNA material can link the torso murders to a suspect who died in 1964.

Police hope that DNA testing of mail sent to Eliot Ness will provide clues to the unsolved "Torso Murders" that terrorized the city nearly 70 years ago.

From 1934 to 1938, pieces of seven men and five women were found in fields, and alleys and floating in streams in Cleveland. Only seven heads were recovered and only three victims were identified.

At the suggestion of Stone, police plan to see if DNA material from the letters and postcards link the slayings to Dr. Francis E. Sweeney, who died in 1964.

Ness, the famed Chicago "Untouchable" who was Cleveland safety director at the time of the slayings, received postcards and letters for years afterward. They had various signatures, including an "F.E. Sweeney, M.D."

The killings, which stopped as suddenly as they started, frustrated investigators and shook Cleveland as the city was recovering from the Great Depression.

Crime investigators will take DNA from envelopes that the suspect licked, then compare it to DNA found at the crime scene.

Investigators are waiting for the samples to arrive.

The tests will take several weeks.