My wife destroying my life?

Hi my name is Zeeshan. I am 29 year old and i am living in North Carolina. I am been living in the united states for past 11 years. I married to girl in pakistan about 3 years ago and we have a son together which now i am 80% sure that he is my son too but not 100%. My wife came to usa on a suppose immigrant visa as my wife with my son. When she was in pakistan she always demanded money and it seemed like that money and jewelry was everything to her. When she came to USA she left all the jewlery that we gave her on the wedding day in pakistan with her mom. Some of our reletives in pakistan kept telling us after marriage that she just want the green card and she has no intentions of staying with me. I didn't believe anyone and kept supporting as i thought that she might change when she starts living with me in the USA. She came here about 2 and half months ago and from the word go she was complaining about stuff. On the eid day all of our family went to the mosque for eid prayer and she insisted that she wants to stay home and doesn't want to go. when we came back she had stolen my mom jewelry from her room and $160 with the jewelry. When asked about it she started cursing and saying bad names to my mother and father. First we decided to call the police and later we said that we should settle this in home. Next 2 or 3 days she stayed in our home and will not admit that she stole the jewelry and the money. on the 5th day she started acting really crazy and started throwing stuff in home broke the tv remote control and also hit the tv with a calculator and also there was a dish made she dumped that in the living room and cursed everyone in our house. we made 1 or 2 short videos of her cursing us and threatening us that she will put all of us in jail. when we heard that my little brother went to the police and told them that we had such and such problem at home and they said you go home and if she does something again call us. Later the same day my wife went out of house and called the police from our neighbors home. she told police that her husband had hit her and even hit the child because child had a bruise too. i told police that i didn't do it and she just making all this up. after seeing all the evidence and also one of our aunt was in our home when she threw stuff in house and made a mess. police also asked her few questions. finally, they took her to jail in an assault case. she was released after two days and one of her friends in maryland took her there. We went to the congressmen in our city and told her the story. she told us to write to the INS about this. we wrote a complete letter with details to the INS about what she did to us also sent them a copy of police report. when my wife left NC she took the child with her.

now i have given her divorce according to our islamic laws. In nc there is law that you have to live separate for one year to give the divorce.

she constantly calls me from Maryland and threatens me that she will file a domestic violence law suite against me and will do this and that and that the child is suffering because of me. I told her few weeks ago that i can take care of the child but i will have to get the DNA test before to make sure.

Last night she and one other lady who helps new immigrants called me and they said that the child is in pakistan now. she said that she went there and left the child and came back which i believe is a lie. now that lady is threatening me that she will make my life miserable and will do this and that.

what should i do in this case.

my wife just married me for greencard and so just she could come and live in USA. what are my best options. Please Help.