This is a turn of phrase. It means 'we don't have evidence before the court about how Lisi found out about crack video'. He wasn't testifying as to his own knowledge.
Gotcha
And so I'm going to go on some speculation here...And obviously none of us know what is in the redacted sections.
Why would the lawyer argue, in an attempt to hold back the wiretap, that evidence about how Lisi found out about the video is not yet before the courts?
Could it be that the redacted wiretap in the ITO directly implicates the mayor/DoFo with the extortion efforts?
Blair didn't want to have to arrest the mayor. Someone speculated earlier that Blair had given Ford an out to fess up and resign, which Ford hasn't taken? Lisi is charged with extortion, Ford admits to smoking crack, he resigns in embarassment but no criminal charges are laid. They could have given Lisi a plea deal, no trial, the video never comes out and Blair never discloses that they have it. Ford's ego and reputation are tarnished, but with no charges, the story dies, he goes to rehab and comes back a changed man to run in 2014.
Instead, Ford puts his head in the sand. Now the ITO information directly implicating Ford is being held back. The Crown suggests holding it back for 30 days, with the knowledge that Brazen 2 is wrapping up and the Police investigation is made air-tight in order to charge Ford within the next 30 days.
Would releasing information tying Ford(s) directly to the extortion before charges are laid have an effect on Lisi's right to a fair trial, or the ability for the Police to charge Ford?