Overview: Dr. Sheppard and the butler Parker enter Mr. Roger Ackroyd’s office and find him dead. Roger was stabbed in the neck with a knife and killed for quite some time, so the killer managed to escape far enough. Sheppard asks to call the police, and he quickly does what he had to do, without touching either the body of the murdered person or the dagger. Soon the murdered secretary and Major Blend arrive. Sheppard notices two letters on the floor, but Mrs. Ferra’s blue envelope is gone. He wants to talk about it, but the captain of the police enters the office, and Sheppard bites his tongue. The police are wondering if this could be an accident or suicide? No, this is obvious. Then the version of the robbery is considered, but it does not seem to be suitable either - nothing was missing from Ackroyd’s office. But on the windowsill there are clear traces of the killer - he came here and went out the window.