When did Jack Ruby die?

Shortly before Ruby's death from a pulmonary embolism on January 3, 1967 (although by the fall of 1966 Ruby was also suffering from rapidly spreading lung cancer, with which he believed he had been deliberately infected), a friend insisted that Ruby tell the truth before he died. Ruby replied, "Listen, you know me well, and you know I'm a reasonable businessman. I wouldn't have done it if I did not have to do it." In spite of rambling comments that might be interpreted differently, to the end Ruby insisted that he had not been part of any assassination conspiracy. As his mental condition deteriorated, however, Ruby claimed that Jews were being slaughtered in the building where he was awaiting a new trial, as part of a second Holocaust.