A Guatemalan migrant has been arrested for allegedly lighting a woman on fire while she was asleep in a subway car in Brooklyn. The victim burned to her death while the suspect allegedly sat on a bench “calmly” watching the fire consume her body. The New York Post reports the disturbing crime was one of the most savage to take an innocent life in the city of New York with the police commissioner calling it “one of the most depraved crimes one person could possibly commit.”

The heinous act occurred around 7:30 a.m. Sunday morning on the F Train idling at the Coney Island-Stillwell Avenue station. NYPD Commissioner Jessica Tisch said, “As the train pulled into the station, the suspect calmly walked up to the victim, who was in a seated position at the end of a subway car…and used what we believe to be a lighter to ignite the victim’s clothing, which became fully engulfed in a matter of seconds.”

Cops on patrol initially “smelled and saw the smoke,” Tisch said, leading them to the woman covered in flames in the doorway of the subway car. The cops extinguished the fire, but the victim reportedly died at the scene.

The body cameras of the officers reporting at the scene obtained a “very clear, detailed look at the killer.” Later in the day, three high schoolers reported to the cops that they spotted the suspect in the picture at the Jay and York Street station on the F line, according to Tisch and the NYPD’s Chief of Transit Joseph Gulotta. Cops responding on the scene located the suspect who was seen on another train that was leaving the station.

Halting the train at Herald Square, the cops apprehended the suspect after searching for him from car to car. The suspect was found to have a lighter in his pocket upon his arrest.

Tisch commended the high schoolers who called the cops for their critical help in tracking down the suspect. “They saw something, and they said something, and they did something,” Tisch said, referring to the kids’ phone call to the police upon identifying the suspect through the released images.

Gulotta also praised the high schoolers, recognizing that the public and police worked together to track down the man who allegedly committed one of the most horrific crimes to have hit New York City.

The police reportedly do not believe the migrant and the victim he burned to death knew each other before the disturbing killing. The woman had not yet been identified as of Sunday night.