In September 2012, Saad al-Hilli, 50, his wife, Iqbal, 47, and her mother Suhaila al-Allaf, 74, were all shot dead on a road near Lake Annecy in eastern France. A 45-year-old cyclist by the name of Sylvain Mollier was also killed. The al-Hilli family's two young daughters' - Zeena and Zainab - were spared, despite sustaining injuries.
The bodies of the four victims were discovered by Brett Martin, a British ex-RAF pilot, a resident in France, while he was out riding his bicycle. Despite this, he heard nothing of the shots. Following the incident, the first person that he saw was seven-year-old Zainab, who was stumbling into the road and collapsed in front of the family's car. She had been shot in the shoulder and also suffered a head wound.
The shocking case quickly became the subject of an international manhunt and earlier this year, a man was arrested in Annecy but was later released and eliminated from inquiries. A new Channel 4 documentary series, titled Murder In The Alps, explores developments in the case. Read on to find out everything you need to know about the tragic case ahead of the new three-part series.