Above is a link for various books for troubled teens. It is admirable that you are such a compassionate person and want to help this young man. However, he needs professional intervention as does the family. If you think he is being neglected at home call social services. I am surprise the teachers did not intervene in some way.
No one can fix anyone.. and he needs guidance for sure. But he cannot do it alone. It takes time, care and consistency to heal and change someone who comes from a difficult home life. You can see if there is any teen classes on meditation or yoga. Take him over to a local church to talk to his pastor, reverend, or minister. There has to be programs available in your community. There is also Christian family services where you pay on a sliding scale. You need professional assistance to help, or you soon you will find yourself depressed....I hope this helps. check out my website...www.martaluzim.com. If you sign up for my newsletter you will get free guided imagery.. You might to play this for him to relax and meditate..