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fter skipping earlier summonses by the Corruption Eradication Commission (KPK), four middle-rank police officers came to the antigraft body for questioning on Friday, as witnesses in the driving simulators scandal.

KPK investigators questioned the police officers for nearly 12 hours.

The four officers, Adj. Comr. Wisnu Budhhaya, Adj. Sr. Comr. Wandy Rustiwan, Adj. Sr. Comr. Endah Purwaningsih and Comr. Ni Nyoman Suartini arrived at around 10 a.m.

Instead of wearing their uniforms, three wore batik shirts while Wisnu wore brown striped shirt.

They entered KPK building in silence, with no police guard but two escorts. Reporters who waited for them only guessed that they were the police officers by Endah and Ni Nyoman’s short hair.

Scheduled to testify on Thursday, they skipped questioning, saying the summonses bore incorrect names and ranks.

Acting KPK spokesperson Priharsa Nugraha said that the KPK had sent the letters again.

“The KPK summoned them again to testify for Djoko Susilo today,” Priharsa said.

The four police officers were members of a committee setup for the procurement of Rp 198.7 billion (US$21.06 million) of driving simulators at the National Police Traffic Corps (Korlantas).

Insp. Gen. Djoko Susilo, chief of Korlantas when the graft took place, has been named a suspect by KPK. The antigraft body had also named Korlantas deputy chief Brig. Gen. Didik Purnomo; Budi Susanto, the director of PT Citra Mandiri Metalindo Abadi (CMMA) who won the procurement and Sukotjo S. Bambang, director of PT Inovasi Teknologi Indonesia, the company that finally got the contract from PT CMMA.

The National Police Criminal Investigation Directorate (Bareskrim) has also named suspects in the case.

They are Didik, Budi, Sukotjo, Adj. Sr. Comr. Teddy Rusmawan, the head of the procurement project and Korlantas treasurer Comr. Legimo.

Up to now, the KPK has not summoned Djoko, named a suspect on Aug. 1, as the investigators are still collecting evidence and witnesses statements.

KPK chairman Abraham Samad said Thursday that the KPK would eventually summons Djoko.

“We will call him after Supreme Audit Agency (BPK) finish calculating the state’s loses,” he said, adding that KPK’s methods were different from the police.

The police, who insist on going ahead with a separate investigation, have summoned Djoko a couple times as a witness, but not as a suspect.

Earlier in the investigation, police officers obstructed KPK investigators who raided the Korlantas headquarters in South Jakarta, telling them to leave the building, then preventing them from leaving.

The KPK-Police standoff softened after Samad and National Police chief Gen. Timur Pradopo met President Susilo Bambang Yudhoyono.