On the evening of Olof Palme's assassination, Mårten Palme and his girlfriend had joined his parents and had been at the cinema Grand, where they watched "The Mozart Brothers". When Mårten and his girlfriend left his parents after the cinema, they saw a man who followed Olof Palme. This man was recognized as the murderer of Olof Palme and has been called "Grandmannen". On 6 June in 2020, Stig Engström was recognized as the possible murderer.