"That's all I am able to say"
Well, that statement is absolute b*llsh*t.
You have started a rumour with (so far) absolutely no foundation and when you are questioned, you tell us that "that's all I am able to say".
Why?
Precisely who is trying to stop you from saying more and why?
If this is a matter of confidentiality then why are you posting on pprune? Have you considered contacting the investigating authorities and have you told them that you have something important to say?
Either you know something or you don't. Which is it?
Put up, or Shut up.