Ng Lap Seng, also known as “Mr. Wu,” is in custody in New York after being arrested by the Federal Bureau of Investigation on a conspiracy charge.

Seng was arrested for allegedly lying about the reason he brought $4.5 million in cash to the United States, according to an ABC News report.

Who is Ng Lap Seng, or “Mr. Wu”? Well, Seng previously got in trouble for sending cash to the U.S. illegally, and the Clintons were the ones who benefited.

Ng visited the White House six times in the 1990s during the Clinton presidency and was photographed with the president and then-First Lady Hillary Clinton. What was he doing there?

According to a 1998 report by the Senate Governmental Affairs Committee, Ng was illegally wiring money to an Arkansas restaurateur named Charlie Trie, who was giving it to the Democratic National Committee. Though Trie was prosecuted and pleaded guilty, Ng was never charged.

Hillary Clinton campaign spokesman Brian Fallon said that Ng has not been in contact with the Clinton campaign this election cycle.