I don't understand you. In one instance you cannot trust Warne or Mehta because they are drug-cheats and liars and then flip that stance and accept Mehta saying he and Warne used to have dealings in the past and use that as evidence.
It is not just Mehta's statement, it has been confirmed by the ACU that the person in question who told about the Warne-Mehta meeting to media is a reputable witness :-
http://www.telegraph.co.uk/sport/main.jhtml?xml=/sport/2004/02/15/scfixx15.xml
Last week the story went a stage further when the Indian weekly magazine Outlook tracked down the Indian businessman. The ACU have confirmed he is a reputable witness and originally contacted the unit through a third party.
When the businessman - his name cannot be published because of possible death threats - was traced by Outlook, he offered a verbal testimony which closely matched the three-page submission he had made to the ACU. He said he had been with Mehta at a bar in London in June 1999 when Mehta had rung up several players to fix one of the biggest matches in that World Cup.
In last week's Outlook the businessman claimed that the Super Six match between Pakistan and India at Old Trafford was fixed, allegedly by Mehta, who runs a fashionable restaurant in Delhi and has denied the charge. Pakistan were firm favourites, lost by 47 runs, but still qualified for the semi-finals. India scored 227 for six from their 50 overs; Pakistan, behind the clock after one batsman took 30 overs to score 41, finished with 180.
"I saw Ratan Mehta make and receive in excess of 20 calls on his mobile phone. He had two mobiles with him, one was Indian and one, I think, was British. . . In some of the calls he was making bets or moving money but others were obviously to cricketers. At various times, Mehta told me who he was speaking to and it included (three players, including the above, whose names have to be withheld)."
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Needless to say that the outlook investigation that is mentioned in the above news report is where Ratan Mehta said he 'used to meet Warne in 5 star hotel"