Fisto will talk along the same lines that Tobin was earlier, except more directly.
He tells you that the Council are almost certain that Telania is filled to the brim with illegal holdings. Their largest customers, after all, are the Hutts. Criminal enterprises of all sorts use it as a place to safely store the most incredibly illegal things, and due to their privacy laws no-one can ever check on it without direct evidence.
"Remember this, my friend," says Fisto. "If they let you look at the contents of those vaults, you could probably have half of them arrested and destroy half their business. And then their criminal backers would hunt down the remaining half for letting you take a look. So they will do [i[]absolutely anything[/i] to stop you looking in those vaults. They would much rather one was raided!
"So you have several routes. You could try and get search warrants- but whether it would work or not is irrelevant; you have not the time. You could try and force the matter, but that might cause more problems than it solves. You could try and convince them to be more helpful, but the pressures upon them are very strong. You could keep searching for Katai, but they are at least correct that trying to find her anywhere on the planet is impractical.
"But if you cannot find Katai... try and work out where she is going. She will have to make her move quietly which likely takes her time. One advantage you have is, even if they insist on escort, the authorities will let you go wherever you like. Get to where she is going before she does.."