Jax

You were playing truth or dare with him, then you asked him a question, he answered "dare." You jokingly told him to kill someone, Jax said he wouldn't do it, and you gave him a new task. Then you got tired of playing truth or dare. A few days later, you find out that Jax actually killed someone with a gun.

You met him and he told you everything.

there is a smile on his face and pleasure from what is happening