In the story, Teo has a hard time finding the brothers into the woods, even if he had grown up in town. In real life, the police officers found it difficult because they were only trained to operate in urban environments.
Hélio Fonseca, one of the neighbors involved in the hunt for the serial killer, objected on why the movie was filmed in nearby cities and not on the real locations.
Features real news coverage of the murders back in 1995.
Reaching out the murderer was difficult to the point the agents started to believe the brothers actually had supernatural abilities, as they were described as being able to change locations too fast on their feet. This could be explained as they only knew the forest grounds a lot better than the cops and the neighbors themselves.