Louise killed Mira and Adam

Louise’s killing of Mila and Adam is the decisive crime at the center of The Perfect Nanny: it transforms the intimate routines of childcare into violence and makes the home itself a crime scene. The evidence establishes the weapon and the circumstances surrounding the children’s bath, while the later reconstruction, led by Captain Nina Dorval, retraces Louise’s movements without claiming access to everything that happened in the room.

The Crime and Its Immediate Aftermath

The discovery brings Nina to the Massé family apartment after a call from Rose Grinberg, the children’s music teacher, who identifies Louise as the person who killed them. An ambulance has already taken Mila toward the nearest hospital. In the stairwell, Nina encounters emergency workers carrying the children’s mother out, while Louise remains upstairs, unconscious, holding a small white ceramic knife. Nina orders that Louise be taken out through the back entrance.

Inside, the apartment preserves the evidence of an interrupted domestic day: the television is on, the sink is full, the children’s clothes lie on the floor, and two pink plastic plates hold the remains of lunch. The washing machine’s open porthole reveals a crumpled shirt. Nina records the rooms and their details on a dictaphone, and investigators photograph the pasta and ham left on the plates. The disorder surprises Nina later, once she has learned of Louise’s reputation as a meticulous nanny. The contrast between that reputation and the clutter makes the crime scene more than a record of violence: it unsettles the image of Louise as someone who kept the household in perfect order.

The Weapon and the Bath

During the investigation, Nina asks Paul whether Adam and Mila liked water, whether they usually resisted undressing, and whether they enjoyed splashing among their toys. She raises the possibility that a quarrel might have broken out, or that the children might have found it strange to be asked to bathe at four in the afternoon. These questions establish the bath as the immediate domestic situation the reconstruction will need to recover; they do not settle what the children thought or how the violence began.

The weapon is a small, extremely sharp ceramic kitchen knife, capable of being partly concealed in a palm. Paul recognizes it as a knife Thomas brought back from Japan. Myriam had given Thomas a one-euro coin in exchange, a gesture intended to ward off the bad luck traditionally attached to giving a knife as a gift. The couple did not use it for cooking. Myriam had put it high in a cupboard to keep it out of the children’s reach. The object’s history gives the crime a stark domestic specificity: a gift, briefly countered by a coin and then stored away for safety, becomes the weapon Louise uses against the children.

Reconstruction as Repetition

The next morning, at 7:30—the time Louise ordinarily arrived to join the children—Nina is to lead a reconstruction in the apartment on Rue d’Hauteville. She has informed the investigating judge, prosecutor, and lawyers that she herself will play the nanny. Nina knows the case closely, having been first at the scene, and the reconstruction offers a way to test the crime’s sequence through bodies and actions rather than through evidence alone.

The plan is to repeat small gestures of care: Nina will turn on the tap and test the water with her hand, as she used to do for her own sons when they were little, then call the children to take a bath. The line she will speak is the ordinary invitation that frames the episode: “Les enfants, venez. Vous allez prendre un bain.” Repeating it in the apartment makes the familiar routine newly disturbing. The scene’s horror lies partly in that continuity: the gesture itself remains recognizable as care, even as the investigation places it at the threshold of murder.

The Scene Reconstructed

The reconstruction is anticipated as a possible revelation, a procedure that can make a detail or contradiction newly legible when the people involved return to the setting. Nina expects to enter the unchanged apartment, pass the flowers and children’s drawings left outside, avoid the candles, and take the elevator. No one has returned to collect belongings or papers, so the rooms remain fixed as the stage for the reenactment.

In the role of Louise, Nina imagines the sequence of movements through the apartment: fingers pushed into ears against the children’s cries; repeated trips between bedroom, kitchen, bathroom, rubbish bin, tumble dryer, bed, entrance cupboard, and balcony; bending down and rising onto tiptoe; taking a knife from a cupboard; and drinking a glass of wine beside the open window, one foot on the small balcony. The passage gives the crime a choreography of domestic labor and repetition, but it remains a reconstruction of the movements Nina will perform, not a complete disclosure of Louise’s inner experience or of every moment of the killing.

Significance

The killing makes the ordinary materials of the family home—bathwater, a cupboard, children’s toys, lunch plates, and a household knife—part of the investigation’s account of violence. Its aftermath is approached through precise observation and reenactment: Nina documents the disorder, questions Paul about the children’s habits, identifies the knife’s history, and prepares to repeat the routine that preceded the attack. Yet the procedure does not erase the gap between reconstructing actions and knowing what the children experienced. The final invitation to bathe therefore carries two meanings at once: a familiar call within childcare and the chilling phrase through which the crime is retraced.