Lou Vincent "bared his soul" in an English courtroom knowing he would be grilled about cheating, lying and sex with a prostitute.
That is why the evidence of Vincent is so "compelling", according to Sasha Wass QC who summed up the Crowncase against Chris Cairns overnight.
Vincent did not "sugarcoat" in confessing his wrongdoing, said the Crown prosecutor, even when it went far beyond Cairns' alleged involvement.
He admitted receiving 100,000 pounds from match-fixers Varun Gandhi and Nazeem Gulzar - completely unconnected to Cairns - and approached at least four other cricketers to fix games.
"Lou Vincet said he was a despicable human being. He accepted that. He was humble, contrite, he was honest to you. Lou Vincent bared his soul, with nothing to hide and nothing to lose," said Ms Wass.
She invited the jury to compare that description with what Andrew Fitch-Holland called Vincent: devious and manipulative.
"You may think those adjectives are totally at odds with the man you saw in the witness box."
No deal had been done for Vincent to escape prosecution and he received 11 life bans for admitting his role in match-fixing games in the United Kingdom, said Ms Wass.
She said Vincent reported the original approach from the match-fixer Varun Gandhi when he joined the Chandigarh Lions in 2008 and even sent a photograph of his car's registration to security officers.
He immediately told his agent Leanne McGoldrick and Shane Bond, a fellow cricketer, and they both gave evidence to confirm his version of events.
Vincent gave evidence that he also told Cairns, the captain of Chandigarh, but Cairns denied this.
It was at this meeting, said Vincent, which Cairns congratulated him for reporting the approach and recruited him to match-fix.
Vincent's account had a "ring of truth", said Ms Wass as she reminded the jury of his evidence.
He was caught off guard by Cairns' response, she said, but strangely felt a sense of belonging, that he was part of a gang "under Chris' wing".
Vincent was recently diagnosed with depression and "ripe for the plucking", said Ms Wass.
She reminded the jury of Sir Ronnie Flanagan's evidence, the chairman of the Anti Corruption Unit in the International Cricket Council.
He compared those involved with the corruption of cricketers with paedophiles, who groom the vulnerable and manipulate them for their own end.
And it was Chris Cairns who lured Vincent into the murky world of matchfixing, said Ms Wass.
The defence barristers for Cairns have suggested Vincent concocted his evidence in order to give up the "scalp" of Cairns in order to save himself.
But Ms Wass pointed out Vincent told others about the allegations involving Cairns and match-fixing several years before he confessed to investigators.
He had "poured out his heart" to two friends, Phil Hayes and Steve Pearson about how Cairns had lured him into the murky world of matchfixing.
Vincent also tearfully called his wife Ellie Riley about how he "stuffed up" a fix for Cairns during an Indian Cricket League match in April 2008, when he mistakenly scored a six and a four.
These confessions do not make sense, said Ms Wass, if Vincent had to come up with a "scalp" when he realized he was going to be caught in 2013.
"It's unlikely he would have cooked up this plan to stitch up Chris Cairns in 2008 and spent five years working out how to bring his downfall," said Ms Wass.
After he "stuffed up" the fix in the ICL, she said Cairns was livid with Vincent for costing him so much money and told him to "f*** off".
But Cairns approached him a few months later to fix a game for Lancashire, according to Vincent, at a meeting at a petrol station seen by an international cricket umpire.
Cairns told the jury the meeting was just a social catch-up.
Ms Wass reminded the jury of comments made by Cairns' barrister Orlando Pownall WC during cross-examination of Vincent, where he seemed hurt by the suggestion the cricketers were not friends.
Vincent said Cairns had been to his wedding, to which Mr Pownall replied "but you didn't go to his".
"They were not friends," said Ms Wass, "Lou Vincent was there to be used."
"He was like a needy child having been scolded, was pathetically grateful to be treated with kindness again."
And desperate to earn back Cairns' approval, said Ms Wass, Vincent agreed to underperform in his next match for Lancashire. He scored just one run
Vincent also approached his batting partner, Mal Loye, to underperform in the same game, allegedly on the instructions of Cairns.
Loye, who had earlier played with Vincent for the Auckland Aces, was called as a witness by the defence but Ms Wass said the cricketer strengthened the Crown case.
She said Loye was so shocked by the corrupt approach that he didn't turn down the approach -similar to how Brendon McCullum reacted to the alleged approach from Cairns.
And like McCullum, Loye did not report the approach to the authorities, which Ms Wass said "put to bed" the assertions made by the defence lawyers about McCullum's reluctance in reporting Cairns.
There was a warning from the Crown prosecutor to treat Vincent's evidence with care.
"But that does not mean you should ignore it. The world is full of people who fell from grace."