Zhou Tong is directly linked to the recent hack. This is not debatable - he says that he was a victim of identity theft, through which Chen stole lots of cash.
Sure.
So it is fairly normal for people to question his version of events is it not? People have lost a lot of money after all.
Absolutely - it's just that some people aren't just questioning. If people had only questioned and voiced their doubts, we'd have a whole lot more information from ZT. Right now he's probably keeping information to himself in case police involvement prevents him from getting his/his friend's $40K back.