Witnesses is a French police procedural television series, created by Marc Herpoux and Hervé Hadmar, that premiered in Belgium on La Une on 22 November 2014. Set in the coastal town of Le Tréport in Normandy, France, police detectives Sandra Winckler (Marie Dompnier) and Justin (Jan Hammenecker) investigate when bodies of murder victims are unearthed and left for discovery in... imdb.com