There is mention in one of the articles he received "limited immunity" for providing evidence, which could have helped him avoid a more aggressive effort to get

There is mention in one of the articles he received "limited immunity" for providing evidence, which could have helped him avoid a more aggressive effort to get him. Or maybe they just didn't think the spectacle that would have been his trial was in anyones best interest. Or if you want to get more conspiratorial, he could have been hanging onto these as a negotiating tool: https://www.cia.gov/readingroom/docs/CIA-RDP91-00561R000100020048-7.pdf https://www.cia.gov/readingroom/docs/CIA-RDP91-00561R0001000...