Special CBI Judge Naresh Kumar Malhotra sent Lt Col Ranganathan Suvramani Moni, posted in the personnel division of the Army, and middleman Gaurav Kohli to the agency's custody yesterday after they were produced before it.
Both the accused were arrested after a raid was conducted on Thursday night and produced in court the next day.
Public prosecutor Amit Kumar sought five days police custody of the accused, while submitting before the court that "the larger conspiracy" needs to be unearthed as it is a big racket.
The court was told that the CBI was also trying to find out whether the accused had done similar crime in the past and who were the beneficiaries.
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The CBI also said that they needed voice samples of the accused and their custodial interrogation was required as they were to be confronted with each other, besides some "incriminating" evidence recovered during search.
The CBI told the court that an FIR was registered on June 1 against Moni, Hyderabad-based army officer Purshottam, Bengaluru-based barracks and stores officer (BSO) S Subhas and alleged middleman Gaurav Kohli for the various offences including alleged criminal conspiracy and corruption.
The bribe was paid through hawala channels, the CBI alleged in its FIR.
It alleged that Moni entered into a criminal conspiracy with Kohli and Purshottam, an army officer posted in the engineer stores department (ESD), Kakinara, for influencing the transfer of various officers.
He used to contact Kohli, who was close to senior officers in the personnel division of Army headquarters here.
Kohli used these contacts to pursue transfers of army officers for huge illegal gratification, the FIR said.
Purshottam allegedly requested Kohli to pursue the posting of one D S R K Reddy and Subhas in exchange for bribe, it claimed. Both wanted to be posted from Bengaluru to Secunderabad or Visakhapatnam.
Moni assured Subhas that he would help him get transferred through senior officers in the army headuquarters against payment of illegal gratification, it alleged.