I'll definitely co-operate with any police investigation by providing such information. However releasing the information in public isn't a good choice.
Even though as a community we can determine Chen Jianhai to be the hacker, he hasn't been proven guilty legally yet. That will only happen when he faces a criminal charge.
Also consider the irrationality of some community members I should refrain from posting anything that can potentially induce violence and personal attacks. It won't be good for Bitcoin's image and legal status (if you concern about it at all). I'll have to take into account my personal security as well.
I have his real information only because we were working on a legitimate business. He was introduced to me by a friend who works in a Shenzhen-based information security company (which does penetration tests for large corporations and government agencies). I have never considered Chen Jianhai as a "friend".
So who's this new friend, does he have a name and a phone number?
edit: typo
He is definitely unrelated with the theft. It's a basic ethical requirement for a professional security specialist to responsibly disclose vulnerabilities and not to take advantage of them.
At this point I consider his information to be irrelevant from our investigation. I was just telling you how I knew Chen Jianhai. I didn't meet him in some scammers' QQ group.