Withdrawing Cash from ATM of my Deceased Father's Account and Selling Shares using Internet banking

Hello Learned Friends, My father passed away last year and my brother has been withdrawing money using my father's ATM cards. He has even sold a few of his shares using online banking and changing password of his online demat account using his mobile and impersonating as my dad on a call with the bank after my dad's passing away. I got to know of this when I got an intimation email about the sale of securities as I am the nominee on all his ( My Dad) accounts. He had not informed any bank about his death. Once I got to know I informed all the banks and gave them the death certificate and got all his accounts frozen as I was the nominee on all his accounts. He has since stopped speaking with me and has filled a case on me in UP and also a succession case for grant of succession certificate and made sure that I did not get the notice for the succession case. Which I figured out subsequently when I checked on ecourts website. How can I lodge a case against him for the above withdrawals and using my dad's online after his death. Police are refusing to lodge a FIR as they say where is the place of occurrence of the said incident/offence. How do I know that? He has most probably done it in Noida but I live in Delhi. What should I do please help advise