Can my friend's transaction be traced ?

20D Ago
My friend Michael who lives in Germany, bought Armodafinil from an Indian website, and paid with bitcoin. First he sent the funds from his exchange wallet to blue wallet, then to the seller's wallet. Now his 100 Armodafinil have been confiscated by the German customs and there is a possibility that he might also have to pay a fine on top of that. So he has decided to deny he ever placed the order in the first place, to avoid paying fines. So my question is, is there any way that the authorities can prove he was the one who ordered the package? Keep in mind: Government doesn't know he has some bitcoin or even a crypto exchange account. There were no invoice inside the package. They have no wallet address or anything. This is not a criminal matter, but more like an offence.