Or perhaps something is right in front of your eyes?  If Mr Acosta has evidence of wrong doing on the part of any criminals he would be able to produce it in Court ( where he may land up as part of this push against him ). This would include proof of the crime and of his own actions in any coverup. I understand that if the "evidence" is accepted in his defence it is then legal to produce the same "evidence" in the prosecution of another person.