Do I have the right to file for conservertorship of my deceased brother's estate, due to the fact that his wife never gave us notification of filing.

My brother, died in a fatality on the job while working for a railroad industry. His wife at the time filed for conservertorship of his estate and never notified I or my parents of her filing. Since then, she has re-married, and received a settlement. I have checked into some of my brothers accounts and have found that she has not paid his accounts and has left it to the his immediate family to take care of. She also has sold or changed over titles to property that belonged to my brother and were not in her name. What rights do I, as immediate family have now that she is remarried. I would like all personal property that belonged to my brother and isn't she responsible for paying unpaid debt in my brother's name with the settlement money she received from his death? I would appreciate any information concerning this and would like to know what I can do.