British and French police due to give Alps family murder update 6 September 2013 Last updated at 01:46 British police have travelled to France for the first anniversary of the murder of three members of a British family. They are due to give a joint news conference with French police on the investigation into the murders, which remain unsolved. The family were on holiday by Lake Annecy when they were attacked. The bodies of the four victims were found on a remote forest road in Chevaline. Mr al-Hilli's brother Zaid, who is from Chessington, Surrey, is due to answer police bail next month after he was arrested on suspicion of conspiracy to murder amid claims he doctored documents to ensure he inherited the family estate. He has always denied any involvement in the killings. Since the inquiry started British police have taken 60 statements, seized 5,500 documents and 1,600 exhibits, Surrey Police said, travelling to France several times in the course of their investigation. Detective superintendent Nick May said: "The tragic events of a year ago left four people dead in appalling circumstances. We have established a good working relationship with our French colleagues and are continuing to pursue a number of lines of inquiry in the UK.