Chinatown crime boss Raymond 'Shrimp Boy' Chow - the man at the heart of a federal corruption case that brought down former state Sen. Leland Yee and engulfed City Hall with allegations of 'pay to play' politics, took the center stage in U.S. District Court this week to deny the murder and racketeering charges against him. But anyone expecting his testimony to blow the roof of City Hall or cause Mayor Ed Lee further embarrassment would be sadly disappointed. The trial has largely boiled down to unpacking the nearly decade-old murder of businessman Allen Leung, and whether Chow - who...