Probably his wife passing away, I think she battled a brain tumour (from memory) for a long period which must be horrendous for all to live through.
Yes, I actually went online after I had differences with him to read an article about her illness and death. It was awful and he was left with two young daughters to care for too. I truly feel for anybody who went through or is going through that.
I could see how it would affect somebody psychologically, often with them being unaware just how much. I'm not sure what the correlation is with the City hatred and obsession though, because that is what it is. It has gone beyond normal investigative journalism.