How old is this child? This child is obviously not a newborn or infant given the history of events that have happened since he was born. No state is going to remove a father from a child or remove all support for a child years after the fact. If the child's mom ever got remarried and wanted to have the child adopted, your husband could possibly no longer be responsible for him that way. Paternity issues have to be addressed immediately, and your husband should have brought it up during the divorce. Even without an attorney, he could have said, "I do not believe this child is mine."
Having no relationship with the child also does not affect support. Even if he's not the biological father, he never disputed it, and the state determined that he was the father by default.

