Christian Maréchal, 59, was found with 18 stab wounds in his house in Yvelines, while his wife attended a political meeting. No witnesses, no trace of a break-in, no defensive wounds on the body and a DNA trace found under the victim's nails.
Killer(s) left a farcical letter signed by al-Qaeda, justifying the murder by the French presence in Afghanistan. The author of this missive? A little less than two decades after the events, his identity remains unknown.