The sister of a British scientist who died in a mysterious fall has told how she rescued potential evidence from being destroyed by police. Beverley Hall, 49, said she has been forced to store the clothes her brother wore on the night he died after officers revealed they were due to be burned. She is now campaigning for police to investigate properly the death of Timothy Hampton, who plunged from the 17th floor of a UN building in Vienna last month. Austrian detectives have insisted that Mr Hampton, a 47-year-old scientist involved in monitoring nuclear activity, committed suicide. But Mrs...