Justin Gerstner was born in Ebelsbach in Bayern (Germany). He fled in 1934 from nazi Germany to Enschede, where his uncle lived. During the war he went into hiding on a farm in Eemswoude. During a raid on 31 October 1944 he was chased by the nazis, abused and shot dead. Despite the abuse Justin Gerstner did not betray anyone.
See for more information the following website.
The funeral records at the Jewish cemetery in Sneek reveal that Justin Gerstner was buried there.