Brynn Hartman

Shot husband (actor Phil Hartman) in the head as he slept -- killing him 
instantly.  Later took her own life rather than submit to arrest.


http://incestabuse.about.com/library/weekly/aa053098.htm

http://www.eonline.com/News/Items/0,1,3068,00.html

http://www.saturday-night-live.com/snl/news/1998/june/brynn-cocktail.html