Schäuble is literally the worst.

https://www.wikiwand.com/en/Wolfgang_Sch%C3%A4uble#/CDU_Part...

He failed to do anything about cum-cum/cum-ex. He came up with a tax on fuel for nuclear power plants, that I am convinced was deliberately designed to be in violation of the constitution, leading to a 7 billion tax-revenue loss.

Not to speak of his views law and order and how the wrecked Greece because he doesn't understand economics.

I cannot find any source on his 'conviction'

The greece part was nothing but blackmail anyway. Hundreds of thousands, possibly millions are worse off in greece just because schäuble.

If greece were governed by a right wing party, I'm sure he'd have been most generous. Germany put pressure on them to get rid of the leftists.

The entire case: https://en.wikipedia.org/wiki/CDU_donations_scandal

And where does it say that he was convicted?

oh right, even though he also lied to court they suspended the procecution. Good old democratic germany