the special counsel's team are not leaking....Mueller had all of the prosecutors take lie detector tests to make certain they were not big mouth leakers before he hired them!!And The Mueller team has Leaked every single aspect of their Investigation.
Only after indictments that spell some things out, and subpoenas that have as well, have we even gotten a glimmer of what they've been working on....
What we have found out has been from some Pulitzer prize level investigative reporting by the Press....
And of course a bunch of others simply speculating...