Why? He is the one who took on a large project he didn't know how to do, and lost everyone's records. The entire reason you are all in this mess is because he couldn't be bothered to do a braindead backup.
May I remind you that:
On 2012/01/30 Bitcoin Consultancy became Bitcoinica Consultancy Ltd. (*1)
On 2012/03/22 Bitcoinica Consultancy Ltd became the General Partner of the newly formed Bitcoinica Limited Partnership (*2)
On 2012/03/27 Bitcoin Consultancy was retained to perform a comprehensive security audit. (*3)
On 2012/04/24 Bitcoin Consultancy took over ownership and daily operations of Bitcoinica from Zhou (*4)
On 2012/05/11 Bitcoinica was hacked due to a root password reset via a compromised email server (belonging to a member of Bitcoin Consultancy). (*5)
IOW: Bitcoin(ica) Consultancy is responsible and liable for what happened on 2012/05/11. Bitcoinica Consultancy (a.k.a. "Intersango Guys") includes Donald, Patrick and Amir. Zhou was merely a Bitcoinica employee at that time (or maybe not even that since he has not been paid for work since 2012/04/01).