New York City police arrested and charged a man suspected to have set a woman on fire in the subway early Sunday and then watched from a bench as she became engulfed in flames and died.

The alleged Brooklyn subway arsonist who burned a woman alive on a train car Sunday was arraigned Tuesday on first-degree murder charges at a hearing when even more disturbing details of the homicide were revealed.

Prosecutors on Monday charged 33-year-old Sebastian Zapeta-Calil with first- and second-degree murder and first-degree arson in connection with the death of a woman who died after being set on fire in a New York City subway train a day earlier.