A convicted cryptocurrency fraudster and his wife watched each other being tortured to death after kidnappers failed to gain access to their £380million fortune, according to Russian investigators. Roman Novak and his wife Anna vanished on October 2 after being lured to the Hatta resort area, around 80 miles from Dubai, by criminals pretending to be potential investors. Their mobile phones last pinged near the barren Hajar mountains on the border with Oman, where police later uncovered the couple's remains during a large-scale search across a 500-by-500-metre stretch of sand. Russian media have revealed fresh details about what happened after...