Great name, btw. "West of Purgatory".. heh. You so need to see that movie. I think you'd like it. It's about a group of banditos who enter into a town named Purgatory and find that no one in the town carries a gun. It's a town of non-violence. Very, very interesting. Complete with strange, cryptic shaman. 

So take on Femmes fatales/virginal maiden? I can do that... sort of the gal that can be said, "She walked in on gams the length of stilts and a sad look in her eye. I guess I was always a sucker for blondes, but if I'd known what this dame was gonna get me into, I would have showed her the door." 

So.. murder... hmm... A brother or father? Father works for that, perhaps? Was doing some work for the local mine owner? Accounts or some such.