Mother ped away and brother is trying to take property and bank info from her home. Wants probate attorney.?

Less than 24 hours after our Mother's death my brother was at her home with his meddling wife and they brought wife's mother who is an appraiser to appraise home. I was cleaning up after Mom and said "No!" it hasn't even been 24 hours yet and you guys are selling off all Mother's belongings!" They called police on myself and our two sisters and other brother to try and get their way. The police said for them to leave and take up with probate attorney. What will happen here? There was no will and the home is in a reverse mortgage and owes 60k. Another home next door is paid for and the meddling wife wants to sell quickly for 25k. Please help.