Sucide of Brother

Dear Sir/ma'am Need advice, my Brother has been separated from his wife and Son from past 7yrs due to debts and other family issue(Son threatening him of killing and taking up his father govt. Job) he took volunteer retirement and left the city. Before leaving 2014 he gave a estamp letter of 50rs to me ,which said that i will be residing in my sister house (my house) and i will be undergoing heart surgery if i die during surgery my sister or her family will not be responsible and if any un natural death occurs his son and wife will be responsible. On Monday 2020 i received a call from police station stating that he has hanged himself in the room and need a family member to clam his body they also said he has written a death note of 4 pages and police wanted his Wife or Son to be present asap and collected his wife mob# and coordinated, after that police has formally asked them do they want to file a complaint on anyone so they have filled a complaints on my brother employer (tourchering) guardian( stating his pensions and other retirement benefits has been taken from him 23lak) and my self (he visited frequently and was in touch ~ which was had never happened). Kindly suggest what should i do next can i file a complaint on them based on estamp paper or ?