An Israeli judicial inquiry has ruled out prosecuting the police officers who shot dead 13 Israeli Arabs during a violent demonstration in 2000.
violence had erupted during the event, quite a few died  but they walk free 
( z1 contrast :ARG1 ( z2 and :op ( z3 erupt :ARG1 ( z4 violence ) :time ( z5 event ) ) :op ( z6 die :ARG1 ( z7 person :quant ( z8 many :degree ( z9 quite ) ) ) ) ) )