498a ,section 3 and 4, 504,323,417

My brother got married on 07 Dec 2015. My brother had epilepsy problem about which they were verbally informed before marriage. Even we presented the entire report to them. In January she went Lucknow for her Ph.D thesis defense. In Feb 2016, they moved to Bangalore. In May 2016, my brother, his wife and my mother went Dehradun( her hometown) because she wanted to him to consult that particular doctor. In June 2016, they came back again to Delhi and started living with my parents. Again on 10th July she went to Lucknow to get her Pb.D degree.During the meantime, we came to know that she was pregnant. From 01 August she started working at Delhi University and went again to Dehradun in Rakhi. On 06th September her parents came and said that they are taking her for 1 week but she stayed there for 3 months and haven't even informed any of us. She was staying there and some other girl was working on her behalf at Delhi University to whom she use to pay 27k per month from her salary. On 20th November 2016,her father and brother came and threatened my parents to and brother. On 6th December, she came back to Delhi and stated living. On 5th February 2017,she went to a hotel to meet her parents and than on 06th February 2017, she came with her mother, brother and a friend from his brother while my mother was one at home. She packed all her stuff and left the house. While leaving her brother threatened my mother. On 27th March 2017, a girl child was born. She came again with her mother, brother and two friends of her brother on 29 July 2017 and took all her remaining stuff( video made by us). We have send her court letter on 11th January 2018 asking her to come back and stay but she refused to accept the letter and went USA ON 19TH January 2018 with 10 month old daughter without the consent of my brother she took the child. Now on 11 Nov 2019 while she was in USA , ger father and brother have filed the FIR, 498a, 3 and 4, 504, 323,420,406, 120b. During the investigation, 406, 120b and 420 were removed by the police but 417 ipc was added. We have approached the High court for the quashing if the FIR as Dehradun is not in the Jurisdiction and the case has been filed by her father and brother while she was in USA pursuing her post doctoral. In February 2020 , she wrote an email to the police officer as her statement and came back to India on 22 August 2020 after which her statement has been recorded. Can we also argue on the fact that she herself made the complaint after 3.5 years and therefore it does not hold any credibility? What other measures we can take?