Flynn selling house to pay legal bills in Trump probe

Flynn pleaded guilty to lying about his contacts with Russian officials.

Flynn's 13-year-old, three-bedroom townhouse in Old Town Alexandria outside Washington, which he bought three years ago, was listed for sale in December with an asking price of $895,000 — money he will use to pay his high legal defense debts, his brother Joe Flynn said Monday.

Flynn pleaded guilty on Dec. 1 to lying to FBI agents about his contacts with Russian officials. He misled agents during a White House meeting early in 2017.

"I'm not going to sugarcoat it, this has been a trying experience” for Flynn and his wife, Lori, his youngest brother told ABC News. "It has been a crucible and it's not over."

The investigators led by the former FBI director — once a colleague of Flynn's — scrutinized the general's contacts with Russians, such as the Kremlin’s ambassador in Washington, to whom he spoke about fighting ISIS and possibly other matters at the president-elect’s direction during the post-election transition.

Joe Flynn and other family members set up a defense fund for Flynn to collect donations from supporters. He wouldn't disclose how much has been raised, but he said the family has been surprised and deeply moved by the thousands of individual donations they've received, none of which came from foreign nationals or from Flynn's former boss, Trump.

On Monday, Flynn's criminal defense lawyer Robert Kelner, who negotiated the plea deal with Mueller’s team, declined to comment.

Legal fees in high-profile criminal investigations can easily skyrocket, according to experts.

By pleading guilty, “I guarantee Flynn saved himself a lot of money,” he added.

But the legal debt is not why Flynn decided to plead guilty to the felony count of lying to the FBI, said his friend, historian and commentator Michael Ledeen.

"I think," Ledeen said, "he wanted to stop the pain."

ABC News' Ali Dukakis contributed to this report.