The police open an investigation and determine that Anya's fingerprints on the bottle and glass were indeed planted. Lisa is placed under arrest based on a statement from Mrs. Roper, who had seen her handle the items shortly after Anya's death and had also seen her and Karl embrace.
Karl tells the police of Helen's confession, but they confront him with news that she has stepped in front of an oncoming lorry and been struck, sustaining fatal injuries. With no solid evidence to support it, Karl's claim is dismissed as an effort to shift suspicion away from Lisa.