To understand what Liang did or didn’t do,  you have to understand one other thing: both Liang and Landau have maintained  they did not realize that Liang’s shot had hit anyone. 
      Not realizing  this, neither Liang nor Landau ran for help nor put the shooting over the air.  Liang’s concern was whether he would be fired for improperly firing his weapon. 
       “This was a tragic  accident,” said the prosecutor from another borough, who asked for anonymity.  “To this day, the police department has not changed its policy of patrolling  with your gun out. But what jury is going to be sympathetic to somebody who  didn’t summon help?” 
       Gurley’s death  resembles that of 19-year-old Timothy Stansbury, who in 2004 was fatally shot  by officer Richard Neri while patrolling the roof of a Brooklyn housing  project. Like Liang, Neri’s gun was out when he was startled by Stansbury and  accidentally shot him. 
       Neri testified before a grand jury, which  accepted his account that the shooting was accidental. 
      Similarly, both Wilson and Pantaleo  testified before respective grand juries, which chose not to indict them. 
      Liang, however, did not testify because,  said his PBA attorney, Stephen Worth, “It  was clear there was an attempt to get an indictment all along.” 
      Sources said that Liang would have made a poor witness because, unnerved by the shooting, he is “a  basket case” and would not have testified articulately. 
      Worth is an old-school warhorse who has  represented cops in two of the city’s highest-profile cases. He  represented Charles Schwarz, the so-called “second man” in the bathroom of the  70th Precinct, where Abner Louima was sodomized by police  officer Justin Volpe. 
      Although Schwarz was convicted, an appeals  court overturned the verdict. 
      To this day, it’s unclear whether Schwarz — who ultimately pleaded guilty to perjury — was the second man in the  bathroom, or, as Worth had argued, there was no second man at all and that  Louima had fabricated his account “to preserve his manhood” because he hadn’t  fought back. 
      This prompted Loretta Lynch, one of the  case’s three prosecutors, to refer to him as “Dr. Sigmund Worth.”
      Worth also represented one of the four  cops in the fatal police shooting of Amadou Diallo, an unarmed African  immigrant in the Bronx. None of the four testified before the Bronx grand jury  hearing the case. Bronx District Attorney Robert Johnson, then the  state’s only black district attorney, indicted the four for second-degree or  intentional murder. They were all acquitted at trial. 
      Referring to Liang’s indictment, Worth  said, “Despite the spin anybody wants to put on it, this was an accident.” 
      Worth’s next key decision may be whether  to try the case before a jury or a judge, as is usually the case with fatal  police shootings. That decision could involve more racial politics. That judge  would be Danny Chun, a Korean American, who presided at Liang’s arraignment and  who would be under enormous pressure from both black and Asian activists. 
      In an interview,  Canapi said, “He [Liang] was placed in a situation to help the community. There  was no ulterior motive. 
       “All we ask,” he said,” is that our  officers are not treated as second-class citizens but as any other citizen in  this city who is entitled to due process under the constitution.”
      
        WHO KNEW? Who knew that Police Commissioner Bill Bratton has a  singing voice? 
      There he was Friday night leading well-wishers in the singing of  “Happy Birthday” for Richard Esposito, the NBC’s investigative head, best known  for investigating NBC News anchor Brian Williams. Williams has been suspended  for six months after he lied about being in a military helicopter that was  hit by a rocket-propelled grenade in Iraq. 
      So far as is known, Bratton’s crooning was not audition for  Williams’s job.