Brother committed suicide, no action taken by GRP

Hi Sir/Madam, My brother committed suicide on [deleted] on railway suicide track. Before committing suicide he had posted a death note message on facebook . I have been following up with police officials and i wait outside police station to get updates on the FIR which is 37/2023. I have no proper information. How do i proceed further. The girl and her father has fled the city and no further investigation has been done post [deleted]. The FIR still has not been transferred to local police. I have disabled mother and younger brother. My father expired in 2015. I am so helpless , Girl's mama and father are in police working as SI in kanpur and Lucknow they had threatened my brother . i have recordings , i want further more recordings done to and through his phone .can i request cyber crime team to help me with whatsapp chat and call recordings of whatsapp and phone calls. Any suggestion help from your end would be really appreciated. Content and link : My wife her mother father and her uncle kuldeep and his son Mohit are responsible for my death i been tortured mentally pressurized by my wife should not get any job or finical benifit, please take strict action against my mother in law and his brother kuldeep police mai hone ki dhamki de rahey hai usk paapa aur mama, us mother unke saat mujhe satha rahi hai. Meri aur meri sister brother mother ki call tap kiya gaya hai priya meri wife ne bola. They are asking written letter. Maine Priya ko lesson sikha ne k liye hi apne maa ko waha piche latne bola tha. Mera aur ko intention nahi tha. Priya ne ye bola giri to hai chot to nahi lagi problem kya ismai. Please take action against my all my in-laws. My mother is sick she is not taken proper care by my wife. I'm very loud and clear with my statement https://www.facebook.com/vasuco/posts/pfbid023XENnsRbz428kpqkyeTNYSnfqnmZJPxtyQPcEfkxeowMNrARYXmiJreSfHyAunRCl