Wash This Blood Clean From My Hand

Between 1943 and 2003 nine people have been stabbed to death with a most unusual weapon: a trident. In each case, arrests were made, suspects confessed their crimes and were sentenced to life in prison. One slightly worrying detail: each presumed murderer lost consciousness during the night of the crime and has no recollection of it.

Commissaire Adamsberg is convinced all the murders are the work ...