John Smith , 28 , was shot after entering a stairwell in Brooklyn with girlfriend . A Brooklyn police officer ` ` accidentally discharged '' his weapon , police said . Police Commissioner William Bratton calls him a ` ` total innocent '' Brooklyn police . Liang and his partner were part of a `` violence reduction overtime detail '' at the Pink Houses , where a spate of serious crimes have been reported in recent months , including two robberies and four assaults , Bratton said . Ken Thompson says shooting is ` ` deeply troubling ''
John Smith , 28 , was shot after entering a stairwell in Brooklyn with girlfriend . A Brooklyn police officer ` ` accidentally discharged '' his weapon , police said . Police Commissioner William Bratton calls him a ` ` total innocent '' Brooklyn police . Ken Thompson says shooting is ` ` deeply troubling ''