The man accused of killing a woman sleeping on a New York City subway car by setting her on fire after what prosecutors say was a night of heavy drinking pleaded not guilty to charges of murder and arson at a court hearing on Tuesday. A grand jury has indicted Sebastian Zapeta, 33, of one count of first-degree murder, three counts of second-degree murder and one count of first-degree arson in the first degree for the killing of Debrina Kawam, 57. After his arrest, Zapeta told detectives that he often drinks heavily to the point of blacking out, and that he had done so just before Kawam was killed, according to a court filing by prosecutors on Tuesday. Many were horrified by a brief video of Kawam engulfed in flames near the open doors of a train car, recorded by a bystander on the platform. According to the police account, Zapeta used a lighter to ignite the clothes of Kawam, who appeared to be sleeping on a seat in a stationary F train car at the Coney Island-Stillwell Avenue subway station at about 7:30 a.m. on Dec. 22. He then used a shirt to fan the fire, the police complaint said. Kawam was pronounced dead at the scene. When police detectives showed Zapeta video of Kawam being set on fire, he told them that it was him in the video, but he did not recognize Kawam nor remembered it happening, according to the court filing by the Brooklyn district attorney's office.