Suspended FIFA President Sepp Blatter again proclaimed his innocence in a corruption scandal gripping the world soccer body as he prepares to testify this week before the group's ethics panel. "I will fight on for my rights and present my view of things to the ... chamber with great conviction and a firm belief in justice," he told the Swiss newspaper Blick ahead of Thursday's hearing. "I am suspended but not isolated and not at all mute." FIFA ethics investigators called in November for sanctions against Blatter and European (UEFA) soccer chief Michel Platini, both of whom were suspended from their posts for 90 days on Oct. 8 pending a full investigation. FIFA's ethics panel is set to rule on the matter next week. US prosecutors have charged 41 people and entities in an inquiry into soccer corruption. Soccer bosses from throughout the Americas are among the defendants in a case that prosecutors say involves $200 million in bribes and kickbacks tied to the marketing of major tournaments and matches. Blatter is also the subject of a criminal investigation in his native Switzerland. The avalanche of corruption allegations prompted Blatter to say in June he would resign, only days after being re-elected to a fifth term. Blatter has not been charged with a crime. His adviser, Klaus Stoehlker, confirmed Blick's report that Blatter would write his traditional end-of-year letter to FIFA members, this time on his own stationery. "It is the annual letter the president has written for 17 years to the now 209 members of FIFA," Stoehlker said. "This was always a letter with strategic thoughts of the president." Ex-Costa Rica chief agrees to extradition to US A former Costa Rican soccer chief has agreed to stop fighting extradition from Switzerland to the United States to face charges that he accepted bribes in exchange for media and marketing contracts, his US lawyers said late Monday. Eduardo Li, former president of the Costa Rican soccer federation, was one of seven soccer officials arrested in a dawn raid on a luxury Zurich hotel in May. "Mr. Li has decided to deal with the charges in a direct manner rather than through the extradition process," said Samuel Rosenthal, one of Li's lawyers. He declined to comment further. Former Honduran president Rafael Callejas, meanwhile, also left in a private jet for the United States Monday to face charges raised as part of the FIFA corruption scandal, Foreign Minister Arturo Corrales said. Callejas, 72, was head of Honduras' football federation until August this year, and is a current member of FIFA's Television and Marketing Committee. He was president of Honduras from 1990 to 1994. US authorities early this month had also accused him of racketeering, fraud and money laundering. Callejas is accused of receiving $1.6 million in bribes between March 2011 and January 2013 for broadcast rights of games played by the Honduran national team. He has denied the charges.