Oxygen (film)
Oxygen is a 1999 film, directed and written by Richard Shepard. The film follows a troubled cop, Madeline Foster played by Maura Tierney as she pursues a kidnapper who calls himself Harry Houdini Adrien Brody. The film was shot on location in New York City.
Soon after, it is revealed that Houdini was in fact a painter in the police department, and outlined the entire building in a very detailed map. Just as Foster is revealing the truth, Houdini takes her to the place where he buried the first woman. Foster escapes her hold, and releases the woman and takes Houdinis gun, then pushes him inside the coffin. As he taunts Foster, she shoots him rather than burying him.
Source: Wikipedia
