User blog comment:Xilinoc/Ch 649 - The Theatre Suicide SCENE 3/@comment-1248963-20151029173316/@comment-1248963-20151029211007

Was that confirmed in any volume extra or something? His name hasn't even been mentioned at all in the manga since Rose fought Nananasomething. I think there was this partially canon sidestory in which it's said he's been turned into a sort of zombie by Mayuri?