Where can I watch Riddle in United States?

Holly & Nathan Teller live in a small town in Pennsylvania. Holly is on the cheerleading team and has a close relationship with her younger brother Nathan, who is subjected to bullying at school. Nathan is taken for a car ride one day by the bullies, whose intent about what they are going to do with Nathan is not clear. He gives them the slip, but disappears and is still missing after three years.