The attorney-client privilege protects most communications between clients and their lawyers. But, according to the crime-fraud exception to the privilege, a client's communication to his/her attorney isn't privileged if the client made it with the intention of committing or covering up a crime or fraud. OR in the process of committing a crime or fraud.

Is AD guilty? Maybe, maybe not. Does AD being on the flight log prove anything? Not necessarily but it certainly doesn't look good. But what it tells us is AD probably knows quite a bit.