On our trip, we were accompanied by a plainclothes policeman.

Neighbors surrounded men who turned out to be plainclothes policemen.

On July 8, four days before their sentence was up, they were released into the hands of two plainclothes policemen who drove them away.

With my luck, there would be some plainclothes policeman and I'd die.

He was arrested by plainclothes policemen inside the lobby of the assembly.

He was later arrested and beaten by plainclothes policemen before being released into exile.

Could some of these other cars rushing by him contain plainclothes policemen?

He was taken to the Rummelsburg jail by plainclothes policemen.

She opened it and saw a plainclothes policeman holding up his badge.

Until mid-August, there had been only a few plainclothes policemen in the park.