Rep. Ilhan Omar (D-Minn.) is asking President Biden to pardon a former Air Force intelligence analyst who exposed secrets about drone warfare in Afghanistan.

In July, Daniel Hale pleaded guilty in federal court in Alexandria to violating the Espionage Act and was sentenced in July to 45 months in prison for leaking classified documents to the Intercept.

In court, Hale said he felt compelled to speak out about the immorality of the drone program after realizing he had helped kill Afghan civilians, including a small child.

“Not a day goes by that I don’t question the justification for my actions,” he wrote to the judge. “I am grief-stricken and ashamed of myself.”

One document he leaked showed that during a five-month operation in Afghanistan, nearly 90 percent of the people killed were not the intended targets.

“I take extremely seriously the prohibition on leaking classified information, but I believe there are several aspects of Mr. Hale’s case that merit a full pardon,” Omar wrote in the letter sent to Biden on Thursday morning. “The information, while politically embarrassing to some, has shone a vital light on the legal and moral problems of the drone program and informed the public debate on an issue that has for too many years remained in the shadows.”

Omar has also demanded more information from the Biden administration about a recent airstrike in Somalia, where she was born.

She called Hale’s letter to the court “profoundly moral” and urged Biden to consider either a full pardon or commutation of his sentence.

The White House did not respond to a request for comment Thursday morning. The U.S. attorney’s office in the Eastern District of Virginia, which handled Hale’s prosecution, declined to comment.

Prosecutors said Hale could have endangered Americans with his leaks, noting that some of the details were reproduced in Islamic State publications. Hale, they said, recklessly shared reams of sensitive information when he could have simply spoken out in opposition to drone warfare. But no U.S. agency reported any harm caused by the revelations.

This week, Hale was awarded the Sam Adams Award for Integrity in Intelligence, given by a group of whistleblowers from the national security community. Edward Snowden received the same award in 2013.

Biden has pulled U.S. troops out of Afghanistan, calling the war “a conflict that is not in the national interest of the United States.” But his administration has planned to continue drone operations from nearby countries.