I can't think of killing someone. I tried but stories look embarrassing. Still if anybody is interested I'd like to share my victim. Have fun with her.

K/V: Victim
Name: Sally
Age: 20
Sex: F
Characteristics: Asian-European, brown hair, black eyes, wearing: underwear, dressing-gown and leather necklace.

Scene: You are head of brutal gang. Sally was a member of your organization until she tired to poison you. After that you've made her a sex slave and closed her in your torture dungeon. Unfortunately just week later she have escaped.
Two years have passed and your best hunters have found her. She lives on an old ship berthed in harbour. She probably sells her body to sailors for food and fuel. From time to time she unmoor and sails away in the see for a few days.
You and some other gang members have sneaked in her ship before her trip and waited for ship to leave the harbour. (you can take some equipment if you want)
Now is the time for action. Make her up for those two years...