Rights and Responsibilities of Power of Attorney?

My mother died 9 months ago, she was in a car accident had a few strokes, had diabetes and was bed ridden for 4 years. In the mean time, my sister obtained power of attorney and moved money around and even destroyed a will that was in a drop box at a local bank. My sister took $67,000.00 and bought a forclosure home right out in Arizona, she put the house in her daughter's name and grandkids names. She also moved money from one bank to another and out to a bank to Arizona which has my sister's daughter's name on it, the amount we are talking about is 1 million dollars. My sister made a will but my mom refused to sign it and my sister's lawyer refuses to send copy. Is their any thing I can do about any of this since she did buy a house with our moms money while my mom was still alive and then took both properties and all the money that my mom had already had divided out?