CHAPTER THIRTY TWO Riley’s heart pounded harder as the train slowed to a stop. Her breathing quickened. Why am I so nervous? she asked herself. After all, this was hardly the first stakeout of her long career. But then she realized—it was extremely rare to catch a perpetrator in the very act, in the moment before a crime was committed. Opportunities like this didn’t arise very often. We’d better not screw it up, she thought. She glanced around to make sure that Bill and the two cops were well positioned to see who would come out of the train cars. In a matter of moments, passengers were climbing down the steps from the cars. After a few minutes, the stream of passengers slowed to a trickle. Just when she thought almost no one was left on board, Riley’s eyes lighted on one woman in

