If his name is on the birth certificate, she can attempt to get child support from him. The final decision would be up to the judge that hears the case. Since his name is on the birth certificate, he would also be eligible for visitation if he wanted it (at least until he contests the paternity). If he wants to contest the paternity, he can do so, but he would have to pay for the paternity test (as far as I know). I’m not sure when child support would end for a disabled child. He needs to see a lawyer to discuss his options.