undercover

A 19-year-old woman was killed in September after an undercover police watched a drug deal go down in Oklahoma City.

“We have undercover security,” says Vincent Zurzolo, the suave man in the blue suit in booth 2630 of New York Comic Con.

If you were to have undercover security, Comic Con is the perfect site.

Others seemed to be performing bombastic recitals of their grievances as if they were ill-trained actors or undercover agents.

Undercover detective Gustav Frank sold Mandelbaum several bolts of stolen silk that had been secretly marked.

We're fighting a battle against an unscrupulous enemy, an undercover battle, Steve.

He realized almost at once that such an unknown, undercover echelon would be a must.

We advanced to the river's bank undercover, and commenced firing on the boat.

But secretly he maneuvered the transfer of a five-layers-down undercover man from Madras to Government City.

Never said to anyone that I thought Lee was doing undercover work.