The fourth and final suspect behind the narcotics scheme in Gangnam-gu, Seoul, was arrested Thursday in Daegu, according to Seoul Metropolitan Police Agency. The offender is currently being questioned for charges of violating the Narcotics Control Act. On Wednesday, a woman in her 40s was arrested for offering high school students drug-infused drinks, claiming that they would increase their ability to concentrate. The incident happened in Daechi-dong, Gangnam-gu, which is also the country’