The bank would ask you for proofs and they would investigated further. Since you dint hack the stolen account and only received funds from that account unknowingly, you should not worry but the account I guess would remain frozen.

This is a fact stated:

Funds wired into your account are your responsibility.  If the money that was transferred into your account is stolen, your bank has the right to sweep your account and to hold you criminally liable.
 
You can prevent this from happening to you by placing instructions on your account that no money is to be wired into your account without your specific written approval.
 
Never, ever allow strangers to wire funds into any of your accounts.


Source: http://www.fraudaid.com/check_liability.htm