Nine-year-old son of Kelly McKee Zajfen was found 'unresponsive' at home

msn.com:

Instagram on Friday, writing that she would try to keep going for the sake of his twin sister Lily who has a cardiac condition and wears a pacemaker.

The family friend, who asked not to be identified, said: 'George had no heart problems that they were aware of. Nobody knows what happened right now. 'They're still waiting on the autopsy results.

I don't even think she [Kelly] knows right now. He was just found unresponsive. 'It's hard to believe that it's him when of course it's his sister who has had a heart condition since she was two years old.

Right now, it's very much a mystery for everybody. 'A GoFundMe fundraiser set up to cover funeral expenses, launched the same day by family friend Kate Jefferson, has since seen a flood of donations – including a $5,000 gift from Meghan Markle and Prince Harry in the name of their children Archie and Lilibet.