Yang Yi was interested in the FBI investigation, half out of curiosity, and half to see how much the FBI could actually find out.
Of course, whatever the FBI could uncover and its impact on Big Ivan was not something Yang Yi was particularly concerned about.
Why let the FBI investigate? Because the cleaning crew has infiltrated the FBI completely, and what status does Big Ivan have? He is the highest-level client of the cleaning crew, making the FBI's investigation akin to family checking on each other.
Yang Yi's entire interest now was just to see what the FBI could actually come up with. Seeing more and learning more could always be beneficial, especially if he ever found himself in trouble in the future and needed to hide something.
Investigating a case takes time. Even with the FBI's powerful resources within the United States, they couldn't immediately find anything in the shortest time possible.
