21917 Euclid Street was the address of an apartment building where Marika Donoso lived with her sister Rosa. Marika and Rosa lived in unit 6 of the apartment, and their rent was paid by Marika's boyfriend who she knew as "Samuel Aboa". During Day 7, while Marika was at work, Rosa called her and insisted she return home. Marika did so, and when she was there Rosa confronted her about her relationship with Aboa. After Marika left, Rosa called Samuel and made him break off the relationship or she would expose him as an illegal immigrant.