Killing of Al Hilli family has become one of France's best-known cold cases

Saad Al-Hilli, 50, an Iraq-born satellite engineer from Surrey, was shot dead at the wheel of his BMW on a remote mountain road near Lake Annecy in 2012.

Un pistolet Luger a été remonté à la surface par des touristes britanniques qui se baignaient dans le lac d'Annecy.