A Vietnamese migrant worker who had gone missing from his job was caught in Taichung after refusing a traffic stop, and drug tests came back positive — bad news for Taiwan's handling of undocumented workers.

• Police in Taichung's Dali District tried to pull over a car for traffic violations late Friday night, and the driver sped off.
• The car crashed into a police patrol car during the chase; the driver ran but was tackled along with a passenger.
• The driver turned out to be a Vietnamese migrant worker who had left his registered job; the passenger was a legally employed Vietnamese worker.
• A saliva test showed drugs in his system, and he had run red lights and driven the wrong way down the road.

Outlook: The driver faces charges for endangering the public and obstructing officers, and cases like this keep pressure on Taiwan to tighten tracking of migrant workers who go missing.