I didn’t get a reply from the conductor. But a minute later his voice came through the train PA. He said, ‘Passengers are advised that the doors will remain closed for a few minutes due to an evolving incident.’ He spoke slowly. He was probably reading from a card. His voice was shaky. Not at all like the smooth tones of the Bloomberg anchors.

I took a last look around the car and sat down three feet from the headless corpse and waited.

Whole episodes of TV cop shows could have run before the real-life cops even arrived. DNA could have been extracted and analysed, matches could have been made, perpetrators could have been hunted and caught and tried and sentenced. But eventually six officers came down the stairs. They were in caps and vests and they had drawn their weapons. NYPD patrolmen on the night shift, probably out of the 14th Precinct on West 35th Street, the famous Midtown South. They ran along the platform and started checking the train from the front. I got up again and watched through the windows above the couplers, down the whole length of the train, like peering into a long lit-up stainless steel tunnel. The view got murky farther down, due to dirt and green impurities in the layers of glass. But I could see the cops opening doors car by car, checking, clearing, turning the passengers out and hustling them upstairs to the street. It was a lightly loaded night train and it didn’t take long for them to reach us. They checked through the windows and saw the body and the gun and tensed up. The doors hissed open and they swarmed on board, two through each set of doors. We all raised our hands, like a reflex.

One cop blocked each of the doorways and the other three moved straight towards the dead woman. They stopped and stood off about six feet. Didn’t check for a pulse or any other sign of life. Didn’t hold a mirror under her nose, to check for breathing. Partly because it was obvious she wasn’t breathing, and partly because she didn’t have a nose. The cartilage had torn away, leaving jagged splinters of bone between where the internal pressure had popped her eyeballs out.