How could a vehicle escape France shooting scene?

Police in France are still trying to piece together the events surrounding the shootings of Saad al-Hilli, 50, who was killed along with his wife Iqbal, 47, his mother-in-law, and a passing cyclist in Chevaline, close to the tourist destination of Lake Annecy.

Brett Martin, a cyclist who discovered the bodies, said the scene he stumbled across was like something out of a Hollywood film.

The BBC's Christian Fraser has visited the area and he takes a look at possible exit routes near where the shootings took place.