David Adler was executed by firing squad, together with 19 other victims of a reprisal, at the Woudweg in Dokkum.
W.A. Brug, Hun naam leeft voort...! : oorlogsslachtoffers verleenden hun naam aan straten en gebouwen (Alphen aan den Rijn, 1989)
The funeral records at the Jewish cemetery in Leeuwarden reveal that David Adler was buried there.
This person is commemorated on 2 memorials in Dokkum. More information on these memorials ( memorial 1 , memorial 2 ) can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.