WASHINGTON — Justice Clarence Thomas did not disclose that he had sold a string of properties to a longtime conservative donor from Texas in 2014, ProPublica revealed on Thursday.
The transaction is the first known instance of money going directly from the billionaire donor, Harlan Crow, 73, to the justice, in what appears to be a direct violation of disclosure requirements.
The revelation cast greater scrutiny on Justice Thomas, who has long raised eyebrows over questions of conflicts of interest, in part because of the political activism of his wife, Virginia Thomas.
The disclosures have fueled calls by Democratic lawmakers and court transparency advocates for the justices to face tighter ethics constraints.
In 2014, a real estate company linked to Mr. Crow bought a single-family home and two vacant lots on a quiet Savannah street, paying $133,363 to Justice Thomas and his family for the property, ProPublica said.