Dianna Singh's body was found near a quiet laneway in King Township, 12 days after she was last seen, on August 25, 1974.

Dianna, a Toronto resident, was just 21 and working as a waitress when she was killed.

An autopsy determined that she was stabbed to death. She was pregnant at the time.

A police investigation revealed that Dianna was last seen outside a Becker's convenience store near Jane Street and Woolner Avenue in Toronto. Dianna might have hitchhiked to the store.

From the cold case files

Crime Scene Photographs

Photo Gallery: Dianna Singh will appear here on the public site.

Points of Interest

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Help solve Dianna's murder

Can you help us identify Dianna Singh's killer?

If so, please contact the York Regional Police Cold Case Unit at 1-866-876-5423 ext. 7865 or email the investigators directly. Want to remain anonymous? Call Crime Stoppers at 1-800-222-TIPS, leave a tip online at www.1800222tips.com or text a tip by sending TIPYORK and a message to CRIMES (274637).