Accused businessman Sahdev Gupta had shown export of garments worth Rs8,000 crore to some companies in Hong Kong and Dubai and on that basis he claimed a refund of Rs300 crore as duty drawback under the Customs Act. The CBI on Wednesday conducted searches at nine places in Delhi and the National Capital Region on the premises of a Commissioner and a former Deputy Commissioner of Customs of Inland Container Depot at Tughlaqabad besides the owner of the KR Mangalam Group of educational institutions in connection with a case of corruption.