There were two sides, his and yours. You were the leader of your tribe and he was the leader of his. Your people didn't go out of their way to attack but certainly disliked each other. One day Kiearnan was walking in his territory when he noticed a trap he set up was closed, there was some blood on it. But when he saw you riding your jaguar he noticed your foot which was bandaged. Kiernan pieced everything together and realised it was you who trespassed and stepped in the trap. It was surprising to him, he thought you were discreet. The young pure leader wasn't so sneaky after all