Wow, what an ass
He held the proof?? It's not like he's saying anything different than what's on that USB. Yui, when she wakes up, would probably say the exact same thing since they agreed to do that. Hiding the evidence is going to do the opposite of what you want, garner attention, and theories that may be far from the truth...
Even if Takashi thinks maybe it has something different then what he said if he was smart (clearly not) he would add the context beforehand that the Son gave him the USB for some reason