WASHINGTON − Republican megadonor Harlan Crow paid private boarding school tuition for the grandnephew of Supreme Court Justice Clarence Thomas, according to report Thursday in ProPublica that was likely to bring a fresh round of scrutiny to both Thomas and the ethics practices at the nation’s highest court.

Thomas had taken legal custody of his grandnephew at the time and told C-SPAN in an interview he was “raising him as a son.” Tuition at the Georgia boarding school ran more than $6,000 a month, ProPublica reported. Thomas did not note the payments from Crow on his annual financial disclosures.

The revelation was the latest involving Thomas and Crow, who paid for lavish trips and private jet travel for the justice and his wife and who purchased three Georgia properties from Thomas and his family − none of which were reported on disclosure forms officials are required to file to give the public insight into their financial arrangements.