Rizky Amelia – Graft suspect Nunun Nurbaetie has reportedly handed over evidence that is compelling enough to implicate the main players behind the bribery case linked to a 2004 central bank appointment process.

"The proof is strong enough to give us hope that we can catch the key perpetrator," Corruption Eradication Commission (KPK) chairman Abraham Samad said on Wednesday. However, he did not disclose what kind of evidence Nunun had given, adding that it was still being investigated.

Nunun has been accused of distributing traveler's checks to dozens of lawmakers on the House of Representatives finance commission to secure support for Miranda Goeltom's bid for the position of senior deputy governor at Bank Indonesia in 2004.

She is said to have distributed Rp 24 billion ($2.6 million) via middleman Ari Malangjudho to 48 lawmakers and was named a suspect in the case in February this year.

Twenty-eight sitting and former members of the 1999-2004 House of Representatives have been jailed in the case, while two others died before they could stand trial. However, Nunun's lawyer Ina Rachman claimed last week that her client could prove that Miranda was party to the bribery.

Abraham said Nunun's testimony had led the KPK to compile a list of witnesses for questioning but again declined to name any of the witnesses. "We won't publicly identify the people we plan to summon as we fear they may flee," he said.

Nunun appears now to be healthy enough to face the KPK's questioning. She had been hospitalized twice in the recent past after fainting or feeling unwell while being questioned at the antigraft body.

The KPK also continued to investigate the possible role of Bank Artha Graha employee Suparno in the case.

A total of 480 traveler's checks were purchased from Bank Internasional Indonesia by Bank Artha Graha, at the request of palm oil firm First Mujur Plantation and Industry, meant to pay for plantation land in North Sumatra. However, they somehow made their way to Nunun.

Suparno was the one who reportedly purchased the checks from BII. "He is being questioned as a witness in the Nunun case," said Priharsa Nugroho, a spokesman for the KPK.

Miranda herself has been questioned multiple times by the commission but has not been named a suspect in the case.

Denny Indrayana, the deputy minister for justice and human rights, said the government had imposed a travel ban on Miranda starting on Dec. 12.

In an apparent attempt to deny Miranda's claim that she only knew Nunun as a fellow socialite from parties and other gatherings, Nunun's husband, Adang Daradjatun – the former National Police deputy chief and now a Prosperous Justice Party (PKS) lawmaker – also showed a photograph of Miranda, his wife and himself. He did not say when or where the photo was taken.

But on Tuesday, after being grilled by KPK investigators, Nunun told reporters that she "knew nothing about Miranda."

Adang questioned why Miranda had not been named a suspect in the case. Golkar Party lawmaker Bambang Soesatyo also came to Nunun's defense, pointing out that she was not the one who had been elected to the central bank.

"The one who has the motive, the one who enjoyed the position, is Miranda," Bambang said. He said both those who paid and those who accepted bribes should face legal charges, adding that the case seemed to have been built to protect Miranda.

Nunun's lawyer, Ina Rachman, also said that Miranda should be named a suspect.

[Additional reporting by Antara.]