In 1956 Kam lived in West Germany under the name Peter Müller as stateless and he was therefore at risk of being extradited to Denmark on a murder charge. The same year Kam applied for and obtained West German citizenship. In 1968 the public prosecutor in Munich investigated the murder. Kam admitted to have fired at Clemmensen but only as an "act of solidarity" after Helweg-Larsen had shot and killed Clemmensen who was lying dead on the ground. The case against Kam was dropped in 1971 on the principle of "in dubio pro reo".