My brother got married in Nov. 2012. In Mar 2014, he disclosed to the family that his marital life is not going good and his wife has been continuously refusing to him for physical relations from the very first day. she accepted that she was having affair with some other person and that marriage was forcefully done by her parents. At that time after interventions of his in-laws, she agreed to live properly with my brother. On mid June 2014 she came back to house . on feb 2015 we came to know about her being pregnant. But suddenly on 29th Apr 2015, when my brother came back from office, she was missing from the house with all the valuable items(Jewellary worth 1.5 Lacs, Dell Laptop and many household related articles). my brother immediately lodged a FIR in local police station. Now that girl's family is threatening to our family and my brother of deadly consequences and all.
My question here is
1) giving the situation, how soon we can lodge for a divorce case in court.
2) What will be the role of family of that girl in the divorce case. Will court ask for their permission to grant dovorce to my brother.
3) Also in given situation, if she somehow comes back, can she and her family still file a dowry case against my brother and family. And in such case can police immediately arrest my brother?
I want a sincere suggestion here which can prevent my brother's life being spoiled.