Deta Mona Trimble is the illegitimate daughter of Jessie Trimble and Sherman Gordon. Trimble and Gordon lived together in Chicago with Deta Mona from 1970 until Gordon died in 1974 as the victim of a homicide. On January 2, 1973, the Circuit Court of Cook County, Illinois, entered a paternity order finding Gordon to be the father of Deta Mona and ordering him to pay fifteen dollars per week for her support. Gordon thereafter supported Deta Mona in accordance with the paternity order and openly acknowledged her as his child.
Gordon died intestate at the age of twenty-eight, leaving an estate consisting only of a 1974 Plymouth automobile worth approximately twenty-five hundred dollars. Shortly after Gordon's death, Trimble, as the mother and next friend of Deta Mona, filed a petition for letters of administration, determination of heirship, and declaratory relief in the Probate Division of the Circuit Court of Cook County. That court entered an order determining heirship, identifying as the only heirs of Gordon his father Joseph Gordon, his mother Ethel King, and his brother, two sisters, and a half brother. The Circuit Court excluded Deta Mona on the authority of section twelve of the Illinois Probate Act.
The Illinois Supreme Court affirmed the decision of the Circuit Court on the authority of its earlier decision in In re Estate of Karas. The United States Supreme Court noted probable jurisdiction to consider the arguments that section twelve violates the Equal Protection Clause of the Fourteenth Amendment by invidiously discriminating on the basis of illegitimacy and sex.
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