A South Korean model who confessed to using drugs in the Philippines is under criminal investigation, according to police on Friday, after a rapid drug test came back positive. Kim Na-jung, 32, is currently under investigation for illegal drug use by the Gyeonggi Bukbu Provincial Police Agency. She is to face questioning as to how she obtained the drugs and from whom, including possible accomplices, without physically detention. She tested positive in a drug test she took at Incheon Airport sh