Lafonda Fay Foster, sentenced April 24, 1987, in Kentucky:40
Tina Powell

Lafonda Fay Foster (caucasian, age twenty-two)  was a drug-addicted 
prostitute who also had a lesbian relationship with Tina Powell.  
Over  a course of several hours in one evening, Foster and Powell  
killed five adult victims by shooting them in the head, stabbing  
them repeatedly, cutting their throats, running over them with a  
car, and (in one case) burning them up.  Foster was sentenced to  
death but Powell received a life sentence.

http://www-2.cs.cmu.edu/afs/cs.cmu.edu/user/scotts/bulgarians/njsol/death_penalty_lesbian.txt