Mannen på taket

The police lieutenant Nyman is murdered in his hospital bed and Martin Beck and his colleagues have another murder to solve. They discover that Nyman was a very brutal and tough policemen who got many complaints about police-brutality. Particularly interesting is Åke Eriksson, whose wife died in police custody because of Nyman. Eriksson climbs up on a roof in central Stockholm and starts to shoot at people on the street below...