Her family hasn't released that, and it's possible we'll never know. I'm glad that's the case because we should focus on her incredible life and courage.
> I’ve decided to follow my son. There is no point living without him. Everything I touch, I ruin. I only stayed for him. And now he’s gone,” she wrote on an unverified Twitter account linked to her official account.
https://news.ycombinator.com/item?id=36881814#36882185