Concerned with or in

[mochimochi]

Dear Everyone

I have a question.

Which preposition is correct?

The agent was said to be concerned ( to, with, on, in ) the top secret mission, although no one can trace any clue now.

I think "concerned in" means "involved in"and that "concerned with " means "affected by". So it seems to me "in" is correct, but I'm not sure.

Thanks in advance.

[5jj]

I would not use 'concerned, at all. He was involved in the mission.