Overview

• Tokyo police arrested Park Yong-jun, 30, on suspicion of murdering Ban Ji-won, 40, in Setagaya on September 1.
• Investigators suspect Park slipped into Ban’s auto-lock building by tailgating two days earlier, shortly after officers warned him to stay away following her August 29 complaint.
• Police say they escorted Park to Tokyo Station after he said he would go to Osaka, and they are examining his movements and intent.
• Park arrived from South Korea on a short-term stay on August 23, and the Metropolitan Police’s international crime unit is involved in the case.
• Reporting links the method to an August killing in Kobe in which suspect Masashi Tanimoto, 35, allegedly followed a woman for about 50 minutes and used the same tactic, prompting advisers to urge the “double turn,” vigilance at auto-locks and elevators, and use of the #9110 police line.