You might be interested in this case that occured in the French Alps, a family of holidaymakers have been found murdered in their vehicle at a parking spot in the woods by a cyclist, he found an injured girl outside of the vehicle and when he broke a window to switch the engine off he found a male and two females dead with gunshot wounds to the head he later found another cyclist who had passed him moments before also dead an apparent witness to the crime, the girl was taken to hospital and is now under gendarmes guard and the car was sealed but amazingly eight hours later when the car was searched a four year old girl was found alive hiding under her dead relatives.
http://www.telegraph.co.uk/news/worldnews/europe/france/9526255/The-deadly-side-of-la-France-profonde.html