<p>The Central Bureau of Investigation questioned a senior IPS officer for allegedly covering up the multi-crore IMA Ponzi scheme, CBI sources said on Tuesday.</p>.<p>"Three days ago we questioned Hemant Nimbalkar," the sources told <em>PTI</em>, but did not elaborate.</p>.<p>Nimbalkar and another IPS officer Ajay Hilori were booked by the investigation agency in February after the state government gave its nod to prosecute them.</p>.<p>They are charged with covering up the scam and shielding the Ponzi scheme operators.</p>.<p>Recently Nimbalkar was summoned again after the CBI took custody of Ponzi scheme operator, Mohammed Mansoor Khan, on November 21, they added.</p>.<p>A day after questioning Nimbalkar and Khan, former Congress Minister R Roshan Baig was grilled and arrested, the sources said.</p>.<p>The premier investigation agency arrested Baig on Sunday after day-long interrogation in the Rs 4,000 crore multi-crore I-Monetary Advisory (IMA) ponzi scam, in which over a lakh investors have been duped.</p>.<p>The scam came to light in June last year when the Ponzi scheme operator Mohammed Mansoor Khan fled the country accusing Baig and some government officers of cheating him.</p>.<p>He had alleged that Baig had taken Rs 400 crore from him, a charge rejected by the latter.</p>
<p>The Central Bureau of Investigation questioned a senior IPS officer for allegedly covering up the multi-crore IMA Ponzi scheme, CBI sources said on Tuesday.</p>.<p>"Three days ago we questioned Hemant Nimbalkar," the sources told <em>PTI</em>, but did not elaborate.</p>.<p>Nimbalkar and another IPS officer Ajay Hilori were booked by the investigation agency in February after the state government gave its nod to prosecute them.</p>.<p>They are charged with covering up the scam and shielding the Ponzi scheme operators.</p>.<p>Recently Nimbalkar was summoned again after the CBI took custody of Ponzi scheme operator, Mohammed Mansoor Khan, on November 21, they added.</p>.<p>A day after questioning Nimbalkar and Khan, former Congress Minister R Roshan Baig was grilled and arrested, the sources said.</p>.<p>The premier investigation agency arrested Baig on Sunday after day-long interrogation in the Rs 4,000 crore multi-crore I-Monetary Advisory (IMA) ponzi scam, in which over a lakh investors have been duped.</p>.<p>The scam came to light in June last year when the Ponzi scheme operator Mohammed Mansoor Khan fled the country accusing Baig and some government officers of cheating him.</p>.<p>He had alleged that Baig had taken Rs 400 crore from him, a charge rejected by the latter.</p>