Myth of the Tenz River Troll

For centuries, parents in Tenyl have told their children not to swim in the Tenz River or the Tenz River Troll will get them. Now, several gruesome deaths have been blamed on the mythical creature, causing the citizenry to cower in fear. Constable Inspector Reva Lunaria and her partner, Seeker Cas Rubus, have been assigned to protect Tenyl from this threat, myth or no myth. But you can’t arrest a myth. If the stories are true, then Reva and Cas will have to face down a monster of legend. But if the Tenz River Troll is just a myth, then who or what is murdering the people of Tenyl?