Former South Korean prime minister Lee Wan-Koo was questioned by prosecutors today as part of a widening corruption probe that prompted his resignation last month.
"Nothing can beat the truth," Lee told reporters as he turned up at the main prosecutors' office in Seoul in response to a summons.
"I will tell my side of the story in detail to prosecutors... And hope that this all will be resolved," he said.
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The accusation was made by businessman Sung Wan-Jong, who later committed suicide.
In an apparent suicide note, Sung listed the names of other officials, including current and former senior aides to President Park Geun-Hye, suggesting he had also given them money.
All those implicated, including Lee, have denied the allegations.
Bribery scandals involving politicians and rich businessmen have been a fixture of South Korean politics for decades.
Two former presidents served prison terms for taking bribes and dozens of heads of major business groups have been convicted of forming slush funds to lobby politicians.
After accepting Lee's resignation as prime minister, President Park vowed reforms to "root out prevalent, deep-rooted corruption".