True and False Suspect

Cases of female murders occurred continuously in a certain city, and Michelle, who was responsible for investigating the case, had a huge headache. Police Chief Cram invited a psychologist who specializes in solving crimes to investigate... There were consecutive cases of female murders in a certain city. Michelle, who was responsible for investigating the case, had a huge headache. Police Chief Cram invited a psychologist who specializes in solving crimes to solve the case together. All signs of the investigation show that each murder is related to a man named Lando. The police investigated Lando with all their strength, but Lando was not afraid of Michelle's tracking and even played a game with her. After several contests, Michelle gradually became obsessed with Lando. Eva is Michelle's good friend. Michelle finds out more and more that Eva is more suspected of committing the crime. However, several of her intimate actions with Lando were photographed, and she was suspended... Putting down her burden, Michelle came to Lando's home. Suddenly she found the cotton balls used in the crime and had a dispute with Lando. At this time, Eva appeared with a gun. Who is the real murderer?