This is a great concept. I really love it. I think it would be a great addition to the careers pack and could hopefully allow detectives and police and criminals be more hands on, which I think TS4 needs. If the game doesn't want to get too dark with it, it could be a lights go out situation and then next thing you know one or more sims are dead and you have to figure out how it was done and who did it. This is really great. As far as themes, I agree the vintage glamour pack does cover that, but they could add more film noir stuff to the pack, along with potentially new death types.