Brittney Griner Pleads Guilty to Drug Charges in Russian Court
American officials insist they are doing all they can to secure the release of Ms. Griner, 31, a seven-time W.N.B.A. All-Star, a two-time Olympic gold medalist and the first openly gay athlete signed to an endorsement contract by Nike. At Thursday’s hearing, the chargé d’affaires at the American Embassy in Moscow, Elizabeth Rood, handed Ms. Griner a letter from President Biden.

“Ms. Griner was able to read that letter,” Ms. Rood told reporters outside the courtroom. “I would like again to emphasize the commitment of the U.S. government at the very highest level to bring home safely Ms. Griner and all U.S. citizens wrongfully detained.”

But with tensions between the United States and Russia at their worst level in decades because of President Vladimir V. Putin’s invasion of Ukraine, Mr. Biden has few options to secure her freedom. That was underscored by Mr. Ryabkov on Thursday as he made some of the most extensive comments by any Russian official about Ms. Griner’s case in the nearly five months she has spent in custody.

“Hype and publicity, for all the love for this genre among modern politicians, only gets in the way in this particular instance,” Mr. Ryabkov said. “This does not just distract from the case, but creates interference in the truest sense of the word. That’s why silence is needed here.”

He hinted, however, that Moscow was interested in negotiating over Ms. Griner’s fate, saying she would be helped by “a serious reading by the American side of the signals that they received from Russia, from Moscow, through specialized channels.”

Mr. Ryabkov did not specify what those signals were, though Russian state media has suggested that the Kremlin might be interested in exchanging the American athlete for Mr. Bout, 55, a former Soviet military officer who made a fortune in global arms trafficking before he was caught in a federal sting operation.