I would also advise against calling the police; Scooby is right about some of the likely ramifications.
That said, it might be possible for us to track down and get in touch with his therapist via the resources available here, online. A simple call to the therapist, asking him to go visit the kid, would likely result in him being able to convey the problem. Then, if there's something that needs to be done about it, a professional (therapists are what are called "Mandated Reporters", meaning they must report crimes or abuse if they encounter it, and they are trained to recognize those situations and how to handle them) can do what is best for him.
I was thrown out of my parents' house at 17 because I ceased to be a Christian (wasn't even an atheist, yet!), and it was well over a decade before I developed cordial relations with them again. Avoid that, if you can, friend. Had I caught this thread sooner, I'd have advised you to "stay in the closet" about your beliefs until you leave the home.
That said, it might be possible for us to track down and get in touch with his therapist via the resources available here, online. A simple call to the therapist, asking him to go visit the kid, would likely result in him being able to convey the problem. Then, if there's something that needs to be done about it, a professional (therapists are what are called "Mandated Reporters", meaning they must report crimes or abuse if they encounter it, and they are trained to recognize those situations and how to handle them) can do what is best for him.
I was thrown out of my parents' house at 17 because I ceased to be a Christian (wasn't even an atheist, yet!), and it was well over a decade before I developed cordial relations with them again. Avoid that, if you can, friend. Had I caught this thread sooner, I'd have advised you to "stay in the closet" about your beliefs until you leave the home.

A Christian told me: if you were saved you cant lose your salvation. you're sealed with the Holy Ghost
I replied: Can I refuse? Because I find the entire concept of vicarious blood sacrifice atonement to be morally abhorrent, the concept of holding flawed creatures permanently accountable for social misbehaviors and thought crimes to be morally abhorrent, and the concept of calling something "free" when it comes with the strings of subjugation and obedience perhaps the most morally abhorrent of all... and that's without even going into the history of justifying genocide, slavery, rape, misogyny, religious intolerance, and suppression of free speech which has been attributed by your own scriptures to your deity. I want a refund. I would burn happily rather than serve the monster you profess to love.
I replied: Can I refuse? Because I find the entire concept of vicarious blood sacrifice atonement to be morally abhorrent, the concept of holding flawed creatures permanently accountable for social misbehaviors and thought crimes to be morally abhorrent, and the concept of calling something "free" when it comes with the strings of subjugation and obedience perhaps the most morally abhorrent of all... and that's without even going into the history of justifying genocide, slavery, rape, misogyny, religious intolerance, and suppression of free speech which has been attributed by your own scriptures to your deity. I want a refund. I would burn happily rather than serve the monster you profess to love.