Giovanni Angelo Becciu, Prefect of the Congregation for the Causes of Saints. He's been known as a kind of shady guy for a while, but Italian news sources are apparently saying Francis finally became aware of just how extensive his financial misdoings were and demanded his resignation.
This is the first "renunciation of the rights of a cardinal" in decades when there wasn't some sort of sex abuse angle to whatever the guy's problem was. It's drastic enough and sudden enough that some of my Catholic journalist friends are wondering if there's an arrest imminent.
