Of course he is guilty – there would be no hesitaion if he was innocent. But Sunak knows that the ERG will be upset, and that Braverman and others also would be found guilty. there is also the investigation about him to be faced. If he sacks Raab, does this mean that de facto he should resign if found guilty? And how many other ministers, past and present (Johnson, Hancock, Coffey for starters).
So he has been allowed to resign – very ungracefully! What a prat!