undercover

Murillo, an undercover detective at the time, was chasing a man who had seconds earlier jumped out of a car linked to a robbery.

In 1904, Sinclair spent seven weeks working undercover and gathering information about conditions in the meatpacking plants of the Union Stock Yards in Chicago.

A pharmacist filmed selling Botox without seeing patients has been suspended from practice for 18 months after a BBC undercover investigation exposed a dangerous black market in injectable cosmetic drugs.

Two care workers have been charged with the ill-treatment of four people at a mental health unit which featured in an undercover BBC investigation.

The stocky Enriquez stood in the middle of the street trying to clear cars whose drivers had tried to block off what they said were undercover immigration agents.