He is arguably one of the worst serial killers France has ever seen. For years, Michel Lambin passed for a peaceful goat breeder in his isolated farm in Caussols on the heights of Grasse. But for justice, this former little Parisian thug would have killed ten times in the 1980s and 2000s. Seven men were murdered and three disappeared forever after crossing them. Little known cases and which, for the most part, have never been elucidated. “Cold cases” forgotten by all.