patrol wagon

He began to waver in his resolution, when a patrol wagon rolled up and more officers dismounted.

Get a policeman and have him ride it away for us in the patrol wagon?

"Dey fetched me here in de patrol-wagon," he said evasively.

A patrol wagon rattled in the street with a great clang of its gong.

It was the police patrol wagon, and in it were the captain of the precinct and a half dozen policemen and detectives.