"When walking past a foreigner's house, there was a unique odor foreigners carry. That is how I fathomed out whether a foreigner lived in the house," Baek was quoted as saying by police. Full article here.
Maybe it was because they didn't smell of kimchi and garlic. Oh! The apartments smelled of deodorant. Funny stuff.
Did you know that Koreans naturally don’t have a sweat smell? That is why deodorant is so difficult to find here.
Thanks to Christopher for turning me on to this one.