Murder Without Pity by Steve Haberman

Paris, France: dark with fog, riots over police killings, and Far Right demagogues. Here state criminal investigator Stanislas Cassel, grandson of a French propagandist for the Nazis during WWII, works at the Palace of Justice. Ashamed of his familys notoriety, he avoids anything political. Instead he absorbs himself, solving small crimes, which he calls his Little Miseries. Little does he suspect the shock awaiting him when he investigates the bizarre murder of a pensioner, who seemed to have lived an uneventful life. A story for todays turbulent times. More frightening than when first published.