IT happened at dawn. Five masked men got down from two Maruti cars outside 170/2, Picnic Gardens Road, a working class neighbourhood in south-east Calcutta. Once they sneaked in, the men moved silently, to a plan. Three of them took up positions at specific points while two went to a rear room. The flimsy door was easily broken open. The Sikh couple sleeping inside were riddled with revolver shots fired at close range. The men bundled the still warm, bleeding bodies in bedsheets and loaded them into the waiting Marutis, which sputtered to life and sped away. The operation was over in minutes. The date: May 17, 1993. The time: 4.45 am.