Kuklinski himself at various times claimed to have killed between 33 and 200 individuals. He favored the use of
cyanide since it killed quickly and was hard to detect in a toxicology test. He would variously administer it by injection, putting it on a person's food, by aerosol spray, or by simply spilling it on the victim's skin. One of his favorite methods of disposing of a body was to place it in a 55-gallon oil drum. His other disposal methods included dismemberment, burial, or placing the body in the trunk of a car and having it crushed in a junkyard. He also claimed to have left bodies sitting on park benches on more than one occasion.
...he met and married Barbara Pedrici, and later fathered 2 daughters and a son. His family and neighbors were never aware of his activities, instead believing that he was a successful businessman.
Richard Kuklinski - Wikipedia, the free encyclopedia
Richard Kuklinski: The Iceman