Nassau County, New York - Richard Cottingham, who was infamously known as the "Torso Killer," was convicted of murder in relation to a 1968 cold case and he has openly admitted that there were more victims.

According to a press release from the district attorney's office, Cunningham (78), who is currently serving a life sentence at South Woods State Prison in New Jersey on 11 counts of homicide, was sentenced to 25 years to life in prison for the murder of Diane Cusick.

DNA evidence reportedly led to his indictment for the crime, which took place in 1968.

Authorities believe that Cunningham followed Cusick, who was 23 at the time, to her car as she left the Green Acres Mall in Valley Stream, New York. Her body was later found in the back seat of her car, and medical examiners determined that she was strangled to death.

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As a part of a plea deal, Cottingham also admitted to murdering four other women.

"Serial killer Richard Cottingham has caused irreparable harm to so many people and so many families," said district attorney Anne Donnelly. "Today, he took responsibility for the murder of five young women here in Nassau County between 1968 and 1973. He overpowered, assaulted, and brutally murdered them to satisfy his craven desires."

Cottingham, who is originally from New Jersey, has admitted to murdering over 100 people since the late 1960s, gaining the name "Torso Killer" because he decapitated and dismembered some of his victims.

District attorney Anne Donnelly said that Richard Cottingham "thankfully will spend the rest of his life in prison where he belongs."