The International Cricket Council's anti-corruption unit has been monitoring the activities of a leading Sri Lanka player since the World Twenty20 in England last year after team-mates became increasingly unsettled by his late-night fraternising with a man they believed to be an illegal bookmaker.
They passed on their concerns to the captain, Kumar Sangakkara, who followed ICC protocol by contacting the anti-corruption unit.
The player has since been investigated by Sri Lankan police, although no charges have been laid; officials from the ICC's anti-corruption unit are said to be dismayed at the lack of progress.
Haroon Lorgat, the ICC's chief executive, has admitted to a general sense of frustration, saying: "The [anti-corruption unit's] working is not that of a policing agency or a newspaper. They have no power to arrest or seize, or carry out a sting operation."
Getting international players to question the honesty of one of their own team-mates is a considerable challenge, but it is essential if the ICC is to root out corruption.
England's one-day captain, Paul Collingwood said: "I love this game fondly. It's very hard to say whether you would blag on someone or whatever but I would like to think I would take every decision in the best interests of the game of cricket."
England take Pak for a spin
Pakistan were held to 126 for four in the first Twenty20 international against world champions England here on Sunday.
Off-spinner Graeme Swann led England's attack with two wickets for 14 runs in his four overs. And with Michael Yardy returning figures of one for 21 it meant England's eight overs of spin yielded three wickets for just 35 runs.
Brief scores: Pakistan 126/4 (U Akmal 35 not out, Yousuf 26, G Swann 2/14)