Christa Gail Pike: 

One of the youngest women on Death Row at age 21, in 1995 Christa used
a box cutter and rocks to torture and murder a 19 year old girl she suspected 
of being interested in her boyfriend. She also carved a pentagram into the
victim's chest. Awaits execution.

http://members.tripod.com/~VanessaWest/aileen.html

http://abcnews.go.com/sections/us/deathrow/deathrow_women.html