▁gu err illa ▁( 4 6 - year - old ▁Her i berto ▁Sal azar ) ▁of ▁the ▁V OP ▁walked ▁into ▁police ▁headquarters ▁in ▁Santiago ▁with ▁a ▁sub - m ach in eg un ▁and ▁k ills ▁three ▁detect ives ▁( G er ardo ▁Rom ero ▁Inf ante , ▁Her i berto ▁Mario ▁Mar ín ▁and ▁Carlos ▁P ér z ▁Bre tt i ) ▁before ▁blow ing ▁himself ▁up ▁with ▁dynam ite , ▁and ▁a ▁ ▁car ab ine er ▁corpor al ▁( J orge ▁Cart es ) ▁is ▁killed ▁by ▁M IR ▁gu err illas ▁in ▁the ▁M IR ▁strong hold ▁of ▁Con cep ción . ▁On ▁ 1 ▁December ▁ 1 9 7 1 , ▁ 5 0 , 0 0 0 - 2 0 0 , 0 0 0 ▁women ▁took ▁to ▁the ▁streets ▁of ▁Santiago ▁to ▁protest ▁against ▁Salvador ▁All ende ' s ▁UP ▁government . ▁Their ▁peace ful ▁march ▁turned ▁ugly ▁when ▁UP ▁radical s ▁attacked ▁the ▁women ▁with ▁rocks . ▁However , ▁their ▁March ▁of ▁the ▁Em pty ▁P ots ▁and ▁P ans ▁sign aled ▁the ▁beginning ▁of ▁a ▁massive ▁coordin ated ▁anti - All ende ▁movement . ▁To ▁keep ▁the ▁memory ▁af resh ▁of ▁the ▁march , ▁women ▁in ▁the ▁middle - class ▁and ▁aff lu ent ▁sub ur bs ▁of ▁Santiago ▁b anged ▁on ▁p ots ▁every ▁night ▁for ▁two ▁hours ▁for ▁several ▁months . ▁ ▁On ▁ 3 0 ▁August ▁ 1 9 7 2 , ▁car ab ine er ▁corpor al ▁Ex