No, they will start an investigation. That investigation will be used to fend off any state or local investigations and will drag on eternally with no prosecutions.
Look what is happening in Chicago with the whole Rezko scandal. He is on ice..no sentence..and no word of what he is spilling.
I think you have it right. The goal will be to obfuscate and delay.
The attention span of most people isn’t really that long anyway.