The journalist Patrick Radden Keefe on trying to unravel the double life and tragic death of 19-year-old Zac Brettler – and what it tells us about London’s dark underbelly For decades, London has been a magnet for global wealth, a flashy playground for the super-rich. To one teenage boy, it contained an elite scene he desperately wanted to be part of: the oligarch class. Not just rich, but powerfully connected billionaires who amassed such huge fortunes with so few questions asked that they