Vanished by the Lake S01 E04 Episode 4

Several locals become suspects: Chloe's father Herve is questioned by the police, Thomas seems to be in an increasingly suspicious position as does Ana's brother, Hugo, who had a relationship with Chloe - a violent one. Lise and Clovis's investigation appears to indicate that Remi Bouchard is telling the truth - the investigation led fifteen years ago was falsified, but to protect who?