My mother passed away and my brothers have taken all her assest and said she was broke

All  too frequently, family members empty out the house before the funeral.   If your mother had a Will, all her assets should pass according to the Will.  If she did not, you can hire a probate lawyer who practices in her county to file and Application for Determination of Heirship and be named to administer her estate.  You can then sue your brothers for conversion (converting the estate's property to their own).  The value of the property, your evidence of its existence and your evidence of who took it may help determine whether this is a feasible or financially sensible approach.