The mystery of Asos co-founder's death: A blazing phone row minutes before he plunged from his Thai penthouse, his £3million in missing Bitcoin - and my startling encounter with his ex-wife. IAN GALLAGHER investigates | Daily Mail Online

The last time Quentin Griffiths was seen alive, he disappeared into a lift that whizzed him to his 17th-floor penthouse. Nothing about his demeanour gave the slightest hint of what was about to happen...