Ampulla of Vater
Illuminator
I don't see Tongo standing up to cross examination and without him there is nothing. Still, maybe nothing will be enough. It's not as if there aren't precedents. But I am expecting acquittal in this case for this reason - that Tongo will be shown to be lying.
Who will be able to prove Tongo lied, and how? It might be similar to Guede in that he feels compelled to stick to his story, lest he end up with even more jail time.