Gwendolyn Graham
Catherine May Wood

Team killers and lesbian lovers.  Killed for sexual thrills. 
Originally planned to murder six victims whose last initials 
would spell out the word "murder", but that turned out to be 
too complicated. Picked on the most vulnerable elderly women 
they could find instead.

Wood eventually ratted out Graham (who had taken another lover).
Graham received life without possibility of parole, 
Wood received 20 - 40 years.

http://darkday.tripod.com/a-h/grahamgwendolyn.html

http://faculty.ncwc.edu/toconnor/401/401lect11.htm

http://www.websurfer13.com/absinthegwendolyn_graham_and_catherine_m.htm