It goes towards credibility
Now, if I were the Chief Executive of a racing team, and the #2 driver comes up to me and threatens to frame me for race fixing by telling him to crash so that #1 driver can win, unless I extend his contract for another year, this is what I would do:
1. Inform the Police immediately
2. Inform the FIA as soon as I am finished informing the Police
3. I would fire the driver immediately after I am finished informing the FIA.
4. Ban the driver from any contact with all members of the team.
Not only did Flav keep mum about the whole thing, but when questioned by the FIA, Flav's second in charge Pat Symonds becomes extremely evasive with his replies, refusing to answer any relevant questions.
You don't have to be a rocket scientist to figure out who is telling the truth.
As I posted before, it would be interesting whether Flav or Pat Symonds will even turn up in Singapore in two weeks time. The ICAC would have good reason to arrest the two for race fixing.