Career
In 1942, he was recruited in England by the Special Operations Executive and sent to Denmark in March 1943 as their chief agent. He was awarded the Distinguished Service Order for his contribution to the resistance movement and assistance with Denmark"s liberation by the Allies. After the war, Muus was arrested by British authorities for embezzlement and surrendered to the Danish.
In June 1946 he was sentenced by a Copenhagen court to two years imprisonment for embezzlement.
He was pardoned after a few months provided he went into voluntary exile from Denmark for five years. Muus himself admitted that large sums of money passed through his hands, but denied all embezzlement charges.
His novel Der kom en dag became a war film in 1955.