Good thing his quick-thinking stepmother knew he could "pass"

His sister? Not so much, it seems.

"Oral history interview with Samuel Oliner"

https://collections.ushmm.org/search/catalog/irn512442

&

"Jewish Survivor Samuel Oliner Testimony" | USC Shoah

https://youtube.com/watch?v=cdICQ4T_9dw&feature=share