In the spring of 1974, the death of 60-year-old Mable Hartmeyer in her New York City hotel room was a quiet tragedy, one that authorities at first overlooked. On April 24, 1974, she was found deceased, and her death was officially attributed to arteriosclerosis, or natural causes. It was a sad but seemingly unremarkable end. The truth, however, was far more sinister.
Mable had not died peacefully; she had been brutally murdered, her death one of a string of violent crimes that had been silently terrorizing the women of Manhattan's West Side.
Mable was a victim of Calvin Jackson, a serial killer and rapist later dubbed "The Central Park Slasher." Between 1973 and 1974, Jackson was responsible for the proven murders of nine women. His victims were typically single women, many of them older, living alone in hotels like the Park Plaza. Jackson, who had a history of drug addiction and petty crime, worked as a porter in the hotel, giving him access and a veneer of familiarity. His method was savage and opportunistic; he would break into his victims' rooms to rob them, then overpower them through strangulation, suffocation, or stabbing before stealing their valuables.
For over a year, the New York Police Department did not realize a serial killer was at work. The deaths were treated as isolated incidents, and in several cases, including Mable's, signs of violence were missed or misinterpreted. The victims' ages and the lack of obvious forced entry in some cases led investigators down the wrong path. It was only after Jackson's final murder that the pieces of the puzzle began to fall into place, revealing the full scope of his terrifying spree.
The breakthrough came on September 12, 1974, after the murder of 69-year-old Pauline Spanierman in a building near the Park Plaza Hotel. A witness reported seeing a young man carrying a television from the building, and the stolen item was soon traced to Calvin Jackson. When police took him into custody, Jackson not only confessed to killing Spanierman but also admitted to a series of other murders, stunning investigators who had not previously connected the cases. His detailed, 182-page confession unraveled the mystery of nine separate deaths, reclassifying them from accidents, natural causes, and unsolved homicides into the work of one man.
Jackson's confession revealed the horrifying truth of what happened to Mable Hartmeyer. He had entered her room, strangled her, and stolen her possessions. The initial ruling of death by natural causes was a chilling mistake that had allowed a predator to continue his attacks for months. In the wake of Jackson's arrest, public outcry grew as residents of the West Side accused the police of negligence in their investigation of the deaths of these vulnerable women.
In 1976, Calvin Jackson went on trial. His lengthy confession, including hours of audio recordings, was the central piece of evidence against him. On May 25, 1976, a jury found him guilty of nine counts of murder, as well as approximately 40 other charges that included rape, burglary, and theft. He was sentenced to four concurrent life sentences with the possibility of parole. The verdict brought a close to a reign of terror that had gone unnoticed for too long, finally delivering a measure of justice for Mable Hartmeyer and the eight other women whose lives he had stolen. Jackson remains incarcerated, serving his sentence in a New York correctional facility.
