Beto O’Rourke returned a $1 million donation from embattled cryptocurrency leader Sam Bankman-Fried four days before Election Day, his campaign told The Texas Tribune this week.

Bankman-Fried founded FTX, a cryptocurrency exchange that was valued at $32 billion before collapsing abruptly in a matter of days earlier this month, setting off an industrywide panic. Many customers of the popular crypto platform may lose all or part of the money they invested. O’Rourke’s team said they returned the million-dollar donation a week before FTX filed for bankruptcy and Bankman-Fried stepped down as its chief executive, but that the decision was made prior to Nov. 4 and took time to execute.

Chris Evans, a spokesperson for O’Rourke’s campaign, said the reimbursement of one of the largest checks to O’Rourke’s gubernatorial campaign was unrelated to the scandals linked to Bankman-Fried’s now flailing cryptocurrency exchange.

He said the money, which was received on Oct. 11, was returned because the donation was unsolicited. Unlike other large donations, O’Rourke had not talked with Bankman-Fried prior to the donation, and the large sum took the campaign by surprise, Evans said.

“This contribution was unsolicited and the campaign’s upcoming [Texas Ethics Commission] report will show that it was returned back on November 4, prior to the news stories that would later come out about the donor,” he said.