Melissa Tremblay was 11 when she disappeared from Lawrence, Massachusetts, on the afternoon of September 11, 1988. She had accompanied her mother and her mother's boyfriend to the LaSalle Social Club but was left to play in nearby neighborhoods. Witnesses who last saw her included a railroad employee and a pizza delivery driver.

Melissa’s body was found the next day in the old Boston & Maine Railway Yard. An autopsy determined she had been beaten and stabbed; her body was then placed on the tracks and a train car severed her left leg. The case went cold for decades despite multiple witness interviews and investigative efforts.

In 2014 investigators developed a DNA profile from evidence on Melissa’s body, and in April 2022 authorities arrested 74-year-old Marvin C. McClendon Jr. He was charged with her murder and tried, but in November 2024 a jury returned a not guilty verdict, leaving the killing unsolved and the perpetrator unknown.

If anyone knew Melissa’s movements that day or saw unusual activity near the Boston & Maine yard in September 1988, please come forward with information.