FREEPORT, Nassau County (WABC) -- Homicide detectives in Nassau County shared new information about a decades-old cold case.

Susan Mann was 15 years old when she was last seen in Queens back in May 1980.

Two years later, her decomposing body was found in a dumpster in Freeport.

Detectives believe Mann was buried and moved from a location where she was buried sometime in 1980 and brought to the dumpster where she was found in 1982.

After her body was found, she was buried as a 'Jane Doe,' but police say her body was recently identified with 'investigative genealogy.'

Detectives say Mann was last seen wearing a striped top, blue jeans and sandals, and riding a bike that was never recovered.

Detectives want to hear from anyone who may have seen her in the Freeport area between 1980 and

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