New Zealand cricket selectors were aware of match-fixing rumours swirling around pace bowler Daryl Tuffey, a team-mate of Cairns at Chandigarh in the 2008 Indian Cricket League (ICL), where outed match-fixer Lou Vincent opened the batting.
They selected Tuffey anyway, Vettori told the court..
Vettori said rumours were "coming back" to New Zealand about the Chandigarh trio.
But Pownall asked how it was that the New Zealand selectors still picked Tuffey, after 2008. He had been selected in 2009-2011.
"We couldn't not select him on the basis of rumours," Vettori told the court.
Tuffey's name had been discussed in relation to the rumours, by selectors - Vettori, Andy Moles, Glenn Turner and Mark Greatbatch - he said.
There were no notes, and those discussions had been more informal one-on-one between individual selectors, Vettori told the court.
Pressed, he said he was sure his memory was correct.
"I didn't make a mistake about that," he said.