Please advise me on my marital issues for dowry and Dv

Hello, I'm married last year and I'm currently doing my PhD. My husband lives isn USA on his H1B visa. After marriage, I joined my husband in the USA for a short term (during my vacation) and he always verbally abused me that I'm still a student and I'm not earning enough money to run the family in the US. I got married in June 2016 and I was sending 1000$ every month for my expenses share to my husband's bank account. That money was never sufficient for him and he always verbally abused me about me not able to give more money to lead a luxurious life in the US. In the meantime he also started accusing me that I'm not slim and he doesn't like to live with me until I lose some weight. In the process of argument, one day he severely punched my face and hit me; and I started bleeding (I have photos of my bruised face taken immediately the same day and all his friends in US knew i went through domestic violence). I told my husband that i would call 911 if he raise his hands on me again. He feared and he called his mom to stay with us in US. She stayed with us for three months and all during her stay she made me sleep alone in the hall and mom and son were in the bedroom. She would be annoyed if husband takes me out in the weekends and would verbally and physically abuse me in his absence. She was pretending to be nice in front of him. Bcz of her torture, I couldn't stay in US and i left to India immediately. I will be finishing my PhD next year and thought I will stay with my husband at least for 2 months during my summer vacation this year. Both husband and his parents are strict that i should not live with him until i finish my PhD and get a job in the US. They are not ready to accept me while I'm a student now. How do I approach this issue? Please advise. Husband has some close ties with political parties and my family doesn't have it. I fear raising complaints against him and his family.