My Dad has passed but my brother won't let me into Dad's house and it's 1/4 mine. Any advice?

My youngest brother kept me from seeing my dad-92 in a senior care with violations. My brother (60) wont let me in my dads house which is one fourth mine-wouldnt let me see my 62 year old dad--senior violations and know my dad dead--brother refused my phone calls, flowers and visitation to see my dad-have hotel bills when attempting to see my dad-what do you do with brother that is abusive to me-age 67-want to file against him and take action-