CHAPTER THREEThe Breakthrough That Wasn’tIt took six days for someone to name them.Inspector Raghav Pillai, on loan to SN’s SIT from the Railway Protection Force, was the one who did it, and he did it the unglamorous way real breakthroughs usually happen — not with a flash of intuition, but by being the one person in the room who had spent fifteen years staring at exactly this kind of number for a living.“Sir.” He pushed the printed page across the table like it was evidence of something already solved. “These aren’t random. 20806 is the Andhra Pradesh Express — Delhi