Assistant Chief Constable Rob Price from Surrey Police told the press today that the investigation into the murder of three members of the al-Hilli family will be lead by French police.
Mr Price said that there would be "inevitable complexities and challenges" of different languages and legal systems, but said that this had been "overcome".
Brett Martin, the first witness who found the British family in the Alps has described the moment he came across the attack.
A friend of the al-Hilli family has said he believes he could assist the investigation into the fatal shootings of the three family members.
A previously unreported witness has told a French paper how he came across the aftermath of the killings of the al-Hilli family in the Alps.