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 but they walk free
( z1 contrast :ARG1 ( z2 erupt :ARG1 ( z3 violence ) :time ( z4 event ) ) :ARG2 ( z5 walk :ARG0 ( z6 they ) :ARG1-of ( z7 free ) ) )