WHO KILLED JEAN CLARK?

According to https://murderincorp.wordpress.com/torso-killer/, Jean Clark was a resident of 235 W 46th in Manhattan near Hell’s Kitchen in New York and was killed on September 3, 1972. The victim was stabbed and strangled with a belt in the bushes along the intersection of the Long Island Expressway and the Cross Island Parkway in Bayside, Queens,