There you go : http://www.theatlantic.com/magazine/archive/2013/09/advertisement-for-murder/309435/ (5 paged article but you can view it all at once).
It seems the journalist is an Atlantic journo and that article was only featured on the Guardian, that's why they took it down.
That's a damn good read. Really drew you into the lives of the victims. I felt bad for them.