A cross-country skier was the 28th person killed by avalanches in the French Alps this winter, while four Italians died on slopes in Switzerland.
Eric Maillaud says that two years after shooting of British family in French Alps it will take a 'stroke of luck' to solve the case.
The group, which included an experienced guide, died after a terrifying 250-metre fall while trying to scale Europe's highest mountain.
Parents manage to climb out of crushed chalet but boys aged seven and 10 are killed in France's Isola 2000 Alpine resort.
Seven instructors have been arrested in the French Alps for providing lessons without a licence as part of a bitter jobs war on the ski slopes.
At least 24 people have died in avalanches in France and Switzerland since Christmas; a similar number have escaped, many with serious injuries.
Arrested man is thought to be brother of Saad al-Hilli, who was gunned down along with his wife and mother-in-law and French cyclist last year.
Officers release image of dark-coloured 4x4 they want to trace in connection with murder last September of engineer Saad al-Hilli and three others.
Officers release image of dark-coloured 4x4 they want to trace in connection with murder of engineer Saad al-Hilli and three others in September.
Breakthrough comes more than seven months after members of a British family were gunned down in an isolated beauty spot close to Lake Annecy.
Scores of angry Britons on skiing holiday in the Alps stage demonstration outside a French police station to protest against instructor's arrest.
French prosecutor says clues into the shooting of al-Hilli family last September may be in data stored on US internet servers, but is denied access.
Aurélie Filippetti urges Bollywood producers to consider the benefits of filming in French Alps during two-day trip with President Hollande in India.
A French cyclist was first target of "disorderly" gunman's massacre of four in the French Alps, including three Britons, French press reports say.