A 55-year-old former CIA officer who previously pleaded guilty to a conspiracy to commit espionage for China’s benefit has been sentenced to 19 years in prison.

Jerry Chun Shing Lee was sentenced in Judge T.S. Ellis III’s Eastern District of Virginia courtroom on Friday. You may remember Ellis from the Paul Manafort trial. Lee was suspected accused of feeding Chinese spies U.S. government secrets in exchange for hundreds of thousands of dollars. Per NBC News:

Sources familiar with the case told NBC News that Lee is suspected of funneling information to China that caused the deaths or imprisonment of approximately 20 American agents, in one of the worst intelligence breaches in decades. Prosecutors said Chinese intelligence officers gave Lee more than $840,000 and that Lee likely gave them all the information he had from a 13-year career as a CIA case officer.

Lee’s lawyers argued that there were serious gaps in the government’s case. The defense said the government failed to prove that all of the money came from China and failed to prove Lee actually disclosed the information in question.

According to Washington Post, Lee, a CIA case officer from 1994 to 2007, was approached by Chinese operatives in 2010; the Chinese agents apparently knew Lee worked for the CIA and “offered to take care of him ‘for life’ in exchange for national defense information, starting with $100,000 and a cellphone.”

Remarkably, Lee reportedly told a former CIA colleague that the agents approached him, but didn’t mention anything about the cash offer for classified information. It seems this was the beginning of the end for Lee:

In early 2012, Lee’s former CIA colleague urged him to reapply to the agency, part of a ruse to bring him back to the United States for questioning. Lee had several interviews with the CIA over the next year, during which he lied about getting instructions from the Chinese and keeping notes that included classified information. He also claimed his tobacco company was doing well, when in reality it was failing. During one trip, FBI agents searched Lee’s hotel room and found a notebook that included intelligence from CIA assets, assets’ true names, and some locations and numbers.

Prosecutors concluded that Lee had, indeed, handed the Chinese the “top drawer” goods. U.S. Attorney Neil Hammerstrom said Lee “sold out his country for money.”

Lee himself admitted on Friday that he let his country down.

“I could only say I’m sorry,” he said.

Lee did not admit giving Chinese agents U.S. secrets.

[Image via Alexandria Sheriff’s Office]