Jean-Christoph Grange - Blood-red rivers

A corpse, hideously tortured and mutilated, is discovered in the French Alps; a primary school in the Perigord region suffers a professional break-in, except that nothing is stolen. What is the connection between these two events, the one appalling and pathologically vicious, the other seemingly innocuous and trivial?
Superintendent Pierre Niemans, posted away from Paris after brutalising an English football fan, is assigned to the murder; Police Lieutenant Karim Abdouf, a second-generation French Arab and consigned to small-town duties, is given the responsibility for the non-theft. As the two narratives alternate and converge, Niemans is led to discover more disfigured bodies--the killer is planting clues which point to each corpse - and Abdouf is drawn into the mystery of a child, dead for many years, of whom all written and photographic traces seem to have been eradicated.