Summary

Beate is riding on a tram in Chapter 21 when she sees a face in the tram headed in the opposite direction—the face of Valentin Gjertsen. He has had extensive plastic surgery and that is why he has escaped notice. She pursues him, but even with back-up, she does not find him.

At the Institute for Forensic Medicine, Harry consults Mia Hartvigsen about the Asayev autopsy. He is confident that given the circumstances, death by natural causes really means murder. The murderer knew how to kill him without leaving any traces. She suggests Asayev could have been killed by an air injection which would put air bubbles into his blood vessel. The question is where the murderer could have injected air without leaving a trace. Harry asks for another examination of the corpse and the second post-mortem finds proof that he was murdered...