[@Gat Izen] Anndd it's more interesting to see a man leave an envelope and then for him to be gone without any word. It makes a man / woman to actually do something like Alexandra did.

Think a little. If someone you love died and you knew something happened to them ( by the evil wishing of someone ) but the police would only say " it was an accident " and then someone you never saw would tell you that he knows what happened to the person you love and leaves you an envelope with an address , wouldn't you go there to see if it's a wild goose hunt ( or chase , don't know the american / english expression xD ) or if it's for real ? :)
Because that's exactly what I would do.