Pam Smart

Convinced her young lover and his friends to kill her husband.
Sentenced to life without possibility of parole.
Inspiration of at least two movies -- 
  "Murder in New Hampshire"
  "To Die For"

http://www.crimelibrary.com/classics6/smart/15.htm

http://www.geocities.com/traciy_curry/pam_smart_article1.html

http://www.hampton.lib.nh.us/hampton/biog/smarttoc.htm

http://crimespider.com/forums/crimeforum/posts/841.html