How can we get the executrix to turn over the property she is supposed to?

The case involves my cousin, his brother and his wife. My Cousin resided in Hamden NY. He was killed in a car accident in vehicle driven by his wife. There is no will. She appointed herself executrix. She filed a simple form for estates with less than 30k in value, and no real estate. She stated that there were no next of kin. She is a convicted felon, and had to file forms for that. She posted 3 check she had received from the auto insurance as the only assets in the estate. My Cousin in Florida is the decedents brother, and is disabled. I am their cousin and am located in Westchester County, NY and will represent the family as I am reasonably close to the Deleware County Probate Court. In reality, there are 7 pieces of real estate in Deleware County, and 2 in St. Johns County, Florida. The FL properties are investment properties willed to the 2 brothers by their mom, my Aunt. There are clearly stated remedies in my Aunt's will. The executrix has transferred the FL properties into he