Joana Oliveira's disappearance initiated an investigation that would take on much more complex contours. The authorities began investigating the case, but the discoveries made during the investigations revealed an unexpected scenario.
The man identified as responsible for the crimes was nicknamed "Cabo Costa." What most drew attention to the case was the fact that it involved someone no one suspected, that is, an apparently ordinary person who aroused no suspicions in their social circle.
The investigation conducted by the authorities managed to establish the connection between Cabo Costa and the crimes, revealing a pattern of behavior that led to the identification of the suspect as a serial killer. The case shocked the local population by revealing that the perpetrator of the crimes was hidden behind a veneer of normalcy.
