Antarctica is the only continent without police, but that doesn’t mean there isn’t any crime. When it was discovered in 2000 an Antarctic researcher had been poisoned, it was too late - seven months had passed his colleagues were long gone. Thomas Bywater explores if Rodney Marks was Antarctica's first murder victim? Thanks to David Fisher, Donald Rothwell and the friends and colleagues of Rodney Marks For more on this series, head to nzherald.co.nz/detour