Eva Kaber (instigator and wife of victim)
Mary Brickel (Eva's mother and accomplice)
Marian McArdle (Eva's daughter and accomplice)

"Lakewood's Lady Borgia," who grew impatient with the inefficacy 
of her husband Dan's arsenic-laced desserts and enlisted her mother, 
daughter and two hired hitmen in a more emphatic solution to her 
marital discord.  Ohio

http://www.lkwdpl.org/lore/lore23.htm

http://www.grayco.com/cleveland/tdc/sample2.html