Carolus Lassila and his wife were killed in an car accident in the Atlas Mountains, from Ouarzazate to Taznakht, about 250 miles south of Rabat on October 26, 1987 when they drove by car after the heavy rain, suddenly to flooding river.
Carolus Lassila ja hänen vaimonsa saivat surmansa onnettomuudessa Marokon Atlas-vuorilla matkalla Ouarzazatesta  Taznakhtiin, 250 mailia Rabatista etelään, 26. lokakuuta 1987, kun he ajoivat autollaan yöllä rankkasateen jälkeen äkillisesti tulvimaan alkaneeseen jokeen.