Police calling for enquiry

My father aged 66 is getting call from Nagpur police station for enquiry regarding my brother case , he was died in heart attack.My brother and his wife seperated from my father and mother 10 years ago and my brother cheated to my father in various his self earned property and sold the properties with help of power of attorney. My brother and his wife had also lodged false complaints in police against my father and mother for harassment eventhough they were not staying my with parents. My father had registered civil suit against my brother for property fraud. Now brother was died because of heart attack and had postmortem and the day before he died my father got brain stroke attack and admitted to ICU and did not attend last rites of brother and My father is in Pune and undergoing treatment and not able to walk and speak properly and police asking to come for enquiry in Nagpur and police person also said my brother got attack becoz of case tension which my father had filed. My father is not in position to travel what to do.