During one of the interrogations, João, who has mood shifts, ends up confessing voluntarily to having beaten Joana, who hit a wall with her head and collapsed dead on the floor. He says he was having s.e.x with Leonor while the girl had been out on her errand, but Joana returned and saw them. She said she would tell Leandro about what she saw. The child tried to run out of the house, but was dragged back in by João and Leonor. Leonor slapped her, and then João also slapped the girl. The child flew against a wall, bumped her head and dropped dead on the floor. He then cut up her body and stored it in plastic bags in the family's freezer. Cristóvão, the detective who is interrogating him, asks some specific questions about the process of cutting. João's answers chillingly detail the process, including correct information about the difficulty in separating certain joints. He also tells Cristóvão that all 4 adults - João, Leonor, Leandro and Carlos - ended up knowing that Joana was dead, as he and Leonor showed the bags in the freezer to Leandro and Carlos when they arrived home, later that evening. João later repeats his confession in the presence of his lawyer, and duly signs it.
The detectives return to Figueira, now with a forensics team, to check whether the information that João has given them yields some traces of evidence. Their discoveries turn out to be much more than they bargained for. They discover the orange flip-flops that Joana was supposedly wearing the evening she vanished. Then they turn the uv light to the wall where João told them the child had hit her head before collapsing dead on the floor.
Her face is clearly 'drawn' on the wall, also two small hands that left a trace that goes down the wall, showing Joana's last movement. They also discover the prints of her hands on the frame of the house's outer door, that were left there at the moment when she tried to escape. João had told Cristóvão how Joana had tried to cling to the door frame, and they had to pull her back in by her legs. Everything is photographed.