Stone Age mummy is still revealing secrets 25 years on

When police heard about the frozen corpse up in the Alps in September 1991, they opened a criminal probe. Murder it was, but the crime was rather old - and the ultimate cold case.

The dead man, found by hikers 25 years ago this week a snowball's throw from the Austrian-Italian border and put in a wooden coffin at a nearby police station, turned out to have died more than 5,000 years ago.

Mummified in the ice, "Oetzi", as he was later nicknamed, was a sensation, providing invaluable scientific insights that a quarter of a century later show no sign of abating.