I am wondering if the train HAD reached the end of the line (IIRC there was a comment about them both being seen riding the train towards the end of the line) and the police officers that smelled the smoke may have been doing a final walk-through to verify that the train is empty - especially if it is known that homeless people often ride the rails as long as they can when the temperatures are brutal as they are right now
The Coney Island station, (in actuality the Stillwell Avenue station), is the terminus for four very busy subway lines——the F, Q, D and N lines.
It’s an elevated track, not below ground, and it is enormous for an el train station.
There is also a bus station terminal below the tracks.
Since it is a terminal station, the trains linger there for awhile before beginning their routes again.
Transit police are there constantly. Apparently they went to that car immediately upon smelling smoke, but made the mistake of not knowing that the man they shooed out was the culprit.
My guess is that the video is from within the subway car, not something nonchalantly filmed by a heartless passenger.
Whether the alcohol bottles were from the woman, or from the man who used them as accelerant, I don’t know.
I do believe the woman was homeless. As others here have said, it was freezing here today and so the unhoused do tend to sleep there.
This is a tragedy. She was a person in despairing circumstances. The guy should be deported and then incarcerated in Guatemala.
IMO
ETA: Found a link at Wiki
en.wikipedia.org