I can see you likely read a Washington examiner headline about Glenn Greenwald being mystified because of Tony Podesta "vanishing". He didn't "vanish" it's just that media is not covering him much since about december 2018, January of this year when he sued some previous clients to collect unpaid bills. They meant vanished from the media.
It's always good to read the article and not just a headline, anon. That is how fake news is spread.