A special court on Tuesday remanded Income Tax assistant commissioner Anjali Bambole, arrested in a graft case, to CBI custody till April 27.
Anjali was arrested last night, two days after the arrest of I-T additional commissioner Sumitra Banerjee and her husband Subratho. The trio have been accused of accepting a bribe of Rs 1.50 crore from a builder to reduce his tax liability.
The CBI today sought custody of Anjali to investigate if more officials of I-T are involved in the crime.
"Anjali had earlier also demanded a bribe of Rs 20 lakh from a developer in Thane. We want to unravel the whole conspiracy," the CBI stated in its remand copy.
The CBI had recovered cash worth Rs six lakh from Anjali's residence.
The investigating agency had yesterday also conducted searches at the residence of I-T commissioner Anirudh Rai.
"So far nothing incriminating has been found from Rai's residence. Verification is going on," CBI DIG Sonali Mishra told PTI.
According to CBI, Sumitra and Anjali had on March 24 examined the documents of the complainant and conducted survey of his sites. The accused had sought the bribe to reduce the builder's tax liability from Rs 25 crore to two crore.
The builder, however, lodged a complaint with the CBI, which laid a trap and caught Sumitra red-handed while accepting the bribe.