Delhi police inspector Ishwar Singh, who, in 2000, exposed the match-fixing scandal allegedly involving late South African captain Hansie Cronje, was booked on Friday by the Central Bureau for Investigation for allegedly possessing assets disproportionate to his known sources of income.

Singh, now posted as Station House Officer of Tughlaq Road police station, was surprised on Friday morning when he found sleuths of CBI's anti-corruption branch knocking at his duplex-flat in the posh Vasant Kunj area of South Delhi.

The CBI slueths began ascertaining his wealth after the agency had registered a case that the cop had allegedly amassed assets worth Rs 40 lakh, disproportionate to his known sources of income.

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During the searches, CBI sleuths claimed to have recovered Rs 1.07 lakh in cash and assets worth Rs 75 lakh.

Singh was the the person who had exposed the conversation between Cronje and alleged bookie Sanjeev Chawla. The conversation had opened a can of worms, after which Indian cricket team was subjected to scrutiny by various agencies including CBI.

• An interview with Hansie Cronje

The match-fixing controversy saw the uncermonious exit of Mohammed Azharuddin from cricket.

The news of raid on Ishwar Singh's residence quickly travelled to South Africa as callers from Johannesburg contacted CBI spokesmen and journalists in India to know about the details about the case.