You Gotta Shoot 'Em in the Head

 is a Fallout 3 quest. It is also an Xbox 360 and PC achievement.

Awhile ago, Allistar Tenpenny hired five mercenaries, Crowley, Tera, Dave, Strayer(Who has since died) and Dukov. They were hired to find a rare gun for Tenpenny. Tera died in the fort and Crowley supposedly bit the dust.

Objectives and walkthrough
Mister Crowley, a resident of Underworld tasks you with finding and killing Dave from the republic of Dave, Ted Strayer, Dukov, and Allistair Tenpenny. He asks you to do this because they are Ghoul bigots. If you manage to successfully persuade Ahzrukhal, you can find out through a short chat with Mister Crowley that what he really wants is the keys each person has. instead or 100 caps for each headshot, he will give you 100 caps for each key you bring him, also with an added bonus. however he still wants you to kill Allistair Tenpenny.

Getting the Keys
You can pay, persuade or kill Dukov for his key.

Strayer's son is now in possesion of his father's key, which you can either persuade him to give you, threaten him or pay him for. Or kill him.