Please answer the following question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What is Thomas Mackelway's job? Title: Suspect Zero Movie plot: Harold Speck, a traveling salesman, is approached by a man in a diner who asks him an uncomfortable question. After leaving the diner, Harold is found dead with his eyelids cut off and clutching a symbol which appears to be a circle with a line through it. The murder is investigated by FBI Agent, Thomas Mackelway (Aaron Eckhart), who was recently suspended for beating a suspected serial killer, Raymond Starkey. Mackelway receives a series of taunting faxes from someone who may be Speck's killer. Meanwhile, kids go missing and we catch glimpses of a big truck. As the investigation proceeds, Mackelway and his partner, Fran Kulok (Carrie-Anne Moss), become aware of the possible existence of "Suspect Zero", a "super serial killer" responsible for hundreds of deaths who leaves no evidence behind to link his crimes together. Another body is found in the trunk of a car, also with his eyelids removed and cut with the crossed-circle mark. The ownership of the car is traced to a halfway house where a room was occupied by a Benjamin O'Ryan. The agents discover that the room is filled with obsessive-compulsive sketches of the crossed-circle design, a Bible which contains sketches of missing persons, and a book on ritual. Questioning the other occupants of the halfway house, Mackelway is told by one of them the design represents a zero, not a circle. Information sent by the killer to Mackelway leads him to O'Ryan (Ben Kingsley), who believes himself to be a former member of the FBI. The agents must decide if O'Ryan is the key to catching Suspect Zero, or if he is Suspect Zero himself. Outside a bar, O'Ryan kills a man who attempts to kidnap and rape a young girl. When Mackelway and Kulok arrive, they find that the body belongs to Starkey, who had been released from prison. Evidence uncovered reveals that O'Ryan was part of Project Icarus, a secret government project attempting to cultivate telepathic abilities in individuals (remote viewing) for military purposes. The experiments gave O'Ryan the ability to see the actions...
Answer:
FBI Agent