It is ridiculous but honestly I bet it won't be the first time the officer has encountered this type of situation. Many, many green card marriages are based on arranged marriage, and the situation of manipulative in-laws being at the center of it all and withholding documents will probably not be unheard of.
As for the girl standing up against the rishta, sounds like it was arranged when she was still a girl (early teens? Just my impression), and if the two families have been living on different continents for a long time it would have been fairly easy for the guy's family to hide his disability.
NYCGori, the girl was in her teens, i believe she was 17 when she got nikahed. but her and her family members were very well aware of his situation. He went to pakistan and stayed at their place until nikah and then returned bak to USA. I did contact the INS and they said she could get her green card wiithout the inlaws consent or involvement. Thank god cause it would have been heartbreaking to know if this case was going to be in public and being a topic for gossip.