Lou Vincent has been accused in court of plotting to blackmail Chris Cairns, of trying to avoid prison in the UK and of attempting to profit from Cairns' downfall by writing a best-selling book.
These are just some of the theories suggested by the defence of what motivated Vincent to confess to match fixing and dob in Cairns.
Vincent is a key player in one of the biggest match-fixing scandals in cricketing history – he's also the key witness in the perjury trial against Cairns.
He's keen to tell his side of the story – but why he's so keen is the subject of great debate.
Vincent says it's for the good of cricket, but Cairns' defence team has a different theory.
His lawyer says it's about knowing he'd be caught and trying to help himself, offering up a big name like Cairns' to the authorities, avoiding prison in the UK and to write a best-selling novel called Zero to Hero about Cairns' downfall.
Vincent says that's nonsense, adding his memoir wasn't for publication.
As well as being charged with perjury, Cairns is charged with perverting the course of justice with his friend Andrew Fitch-Holland.
They're accused of pressuring Vincent to make a false statement.
A recorded Skype call is the main evidence.
The defence has a theory about that too; that Vincent recorded the call to blackmail Cairns or use it to support Lalit Modi – the former cricket boss Cairns successfully sued for libel in 2012.
It's been revealed Vincent is working with him on another case against Cairns.
Modi's legal team are paying for Vincent's time.
In court, Vincent gave an insight into the world of match-fixing and his reasons for coming clean.
He says the bookies – no matter where you are or what you're doing – they find you, that it's an evil and sad world and escaping it is virtually impossible unless you do what he's done.
He says having confessed he's now proud enough to look himself in the mirror.
He recalled former Black Caps captain Stephen Fleming approaching him in 2012, allegedly saying: "I know you're dirty and I know Chris is dirty".
Vincent found it "harrowing" to be cornered by a "figure he looked up to".
Fleming is a potential witness, but that is yet to be confirmed.
Brendon McCullum and Shane Bond are locked in to give evidence – both are expected to appear tomorrow after today's court session ran late.
3 News