A cook has gone on trial in Cologne accused of sexually abusing his baby daughter, in Germany's biggest post-war paedophile investigation. Police say tens of thousands of people in paedophile networks viewed the pictures that Jörg L, 43, posted on the Swiss secure messaging service Threema. A raid on his home last October in Bergisch Gladbach, near Cologne, led police to investigate dozens more alleged paedophiles.