You may note that it mentions the government relying on private investigators.
Additionally this has been investigated privately for at least 4 years.
Lehmann's collaborator Patrice Le Bec, who was hired to conduct the Paris probe, said he had seen people sign off sick and head straight to the airport on vacation.
While some potential recruits had served in Nazi forces and possibly committed war crimes, Wisner believed that their shared opposition to communism outweighed these past actions.
You may note that it mentions the government relying on private investigators.
Additionally this has been investigated privately for at least 4 years.