LONDON — Jack Warner, the former FIFA vice president who was among 14 people indicted by a United States grand jury as part of an inquiry into corruption in world soccer, says he knows why the organization’s president, Sepp Blatter, announced plans to step down.

“Blatter knows why he fell — and if anyone else knows, I do,” Mr. Warner said in his home country of Trinidad and Tobago on Wednesday, referring to Mr. Blatter’s decision this week to resign after 17 years at the helm of FIFA, soccer’s governing body. Mr. Warner, who said he feared for his life, also said he had evidence linking FIFA to his country’s 2010 election.

Mr. Warner was once a close ally of Chuck Blazer, the former general secretary of Concacaf, the governing body that oversees soccer in North America, Central America and the Caribbean. Mr. Blazer has admitted taking bribes from bidders seeking to host the 1998 and 2010 World Cups and is now cooperating with the American authorities. On Wednesday, a judge in New York ordered the release of a redacted version of his plea hearing in 2013.

Mr. Warner’s sons, Daryan and Daryll, are also cooperating with the authorities, having secretly pleaded guilty in 2013 after they tried to deposit more than $600,000 in nearly two dozen United States bank accounts in an attempt to avoid detection.