 In 1930 Mandel lived with his parents in their apartment on Dronning Olgasvej 39-2, Frederiksberg, his father supported the family as an office manager at Magasin du Nord.In 1939 on the first Sunday after Easter Mandel was confirmed in Mariendal Church.On 25 February 1945 Mandel died of his wounds in the German medical clinic at Nyelandsvej, Frederiksberg Hospital.