Two women jokingly agree to kill each others' husbands. Then one really does and blackmails the other into killing her own.
31 July 1961, Joliet, Illinois, USA
20 April 1968, Montréal, Quebec, Canada
2 July 1970, New York City, New York, USA
7 June 1976, North York, Ontario, Canada
12 May 1950, Elgin, Illinois, USA
26 February 1953, Portland, Oregon, USA
