A few minutes later the undercover officers had made a buy.

Let's hope she's not an undercover police officer like the last one.

The hit man turned out to be an undercover police officer.

In fact, he was talking with an undercover police officer.

So, too, is the undercover officer who opened fire last Saturday.

The police could not say if anyone fired at the undercover officer.

He also said the state intended to put undercover officers in other schools.

Carter was married with one child before he became a deep undercover officer.

The nice young client turned out to be an undercover police officer.

He was followed by undercover officers during several trips to the city, the officials said.