Woman in her 20s found with syringe on a bench at Gangnam Station...Simple drug test negative - Seoul, South Korea

A woman in her 20s who was arrested on a bench near Gangnam Station in Seoul, South Korea, on suspicion of administering narcotics, tested negative in a simple drug reagent test.
On the 5th, Seoul Gangnam Police Station conducted a simple drug test on Mr. A, which came back negative, and released him after determining that there was no reason to detain him.
It was revealed that he did. They explained that they had asked the National Institute of Forensic Science to conduct a detailed appraisal of the syringes and other items that Mr. A had in his possession at the time of his arrest.
On the day of his arrest, Mr. A took a psychotropic drug to treat attention-deficit/hyperactivity disorder (ADHD).
It was determined that he had taken the drug. Mr. A was reportedly prescribed ADHD medication at the hospital and was taking it. Prior to this, Mr. A was near Exit 11 of Gangnam Station at around 1:30 p.m. the previous day.
Police arrested him after he was seen using a syringe on a bench. At that time, the police saw Mr. A trying to insert a syringe and tried to interrogate him, but it was revealed that Mr. A had run away once.
Do you get it. Considering that Mr. A appeared hesitant and had more than 10 syringes with him, the police assumed that Mr. A had administered narcotics, and immediately arrested him on suspicion of violating the Narcotics Control Act.
The police plan to request a detailed drug evaluation of Mr. A.