Talk about tightening the net and in a good way. K-ent is reporting that after Yoo Ah In‘s friends and medical professionals associated with life were called in for questioning recently, an arrest warrant has been issued for a Doctor A who has a Gangnam medical clinic and did prescribe some of the propofol Yoo Ah In used. During questioning and investigation about the medical need for the anesthetic, police came to believe Doctor A was himself illegally using drugs hence the arrest warrant is being requested. Doctor A is also reportedly a personal friend to Yoo Ah In beyond beyond a doctor who treated him for procedures.