Families of Prisoners Support Group
This community is dedicated to families that have been disrupted by prison. Having a loved one incarcerated or having been incarcerated comes with its own unique challenges that require support and understanding. Join the group to find others who know what you're going through, and to seek advice or share your experience.
https://www.change.org/p/amnesty-for-my-father-kenneth-bae-a-u-s-citizen-imprisoned-in-a-north-korean-special-labor-camp
They helped with petitions to get this man freed. If it can be done from here to a man in North Korea, it can be done to help your son here. So many stories of people falsely accused, or other reasons they need to get out, and millions of people see this and so many do sign. Try it.
Best of luck to you.