| Since he was age 9 when taken away from his mother.. there is no reason that he won't be able to remember her name. Thus, he will be able to track the marriages and divorces along the way. If husband * 1 was ruled not to be the real father, then that could be a dead end.. unless he is in contact with his birth mom's family, who MIGHT be aware of who she was involved with, at the time she got pregnant.
I won't advise for (or against) contact with the birth family.. that is something he has to decide for himself, and hopefully without risk of emotional trauma.
I don't know that anything can be done in terms of getting access to the prior birth certificates. Normally, when sealed, they are sealed. With careful work.. it is very possible for him to obtain earlier records re his bio grandparents, etc, and work back, at least on mom's side. If someone knows the bio father's name.. and that dad is willing to acknowledge the son.. then he might be able to get that data as well.
I would just suggest that he "tred lightly" and be sure to protect himself emotionally.  |