[@XxFellsingxX]

As you work your way around the building you get a glimpse into the rear of the restaurant through a broken window. You see hundreds of turtle shells hung up on strings, many of them inscribed with Chinese characters and broken in odd patterns. The cops seem to be in the process of gathering these up. You can tell that this is some method of augury. 

You would need to snoop in order to figure out what happened to Madam Chang.