The whistleblower: Mr 10 per cent

Who is Chuck Blazer?

Chuck Blazer A former Fifa executive committee member, Blazer is said to have been closely co-operating with the FBI investigation into corruption in world football's governing body. It was reported last November that he had secretly recorded Fifa executives for US investigators using a keychain fitted with a covert recording device. On Wednesday, hours after a number of his fellow officials were arrested, US prosecutors revealed Blazer pleaded guilty to a string of corruption charges in November 2013. The former Concacaf general secretary, nicknamed Mr Ten Percent after striking a lucrative contract with the US football body, is now facing up to 15 years in jail.

Other key figures...

Daryl and Daryan Warner The two sons of Jack Warner pleaded guilty in July and October 2013 respectively to corruption charges. In March last year, a Daily Telegraph investigation alleged that Warner's family were paid almost $2 million from a Qatari firm linked to the country's successful bid for the 2022 World Cup. Daryan, 46, who lives in Miami, was said to have been helping the FBI inquiry as a co-operating witness.

José Hawilla The 71-year-old is the owner and founder of the Brazilian sports management giant Traffic Group. He pleaded guilty on December 12th, 2014, to corruption charges including racketeering, wire fraud and money-laundering. Aaron Davidson, the president of Hawilla's Florida-based company Traffic Sports USA, was among the 14 suspects detained on Wednesday. The US Department of Justice said Hawilla also agreed to forfeit over $151 million, $25 million of which was paid at the time of his plea.