This is a tragedy. I live about 60 miles from where it happened so it hit close home. I spoke with her grandfather less than 2 weeks ago and on my way home I passed by the place where she was found, it's chilling to say the least. I can tell you that police have a suspect, they've had him for quite some time but he lawyered up and they can't talk to him. However, they may be able to find evidence near the body which will hopefully prove his involvement beyond a reasonable doubt.
Btw, if anyone needs help with the articles in French, let me know.