The detective shook hands with the engineer; then left.

Barth looked at him; the detective merely shook his head.

The detective hesitated, then shook his head and started off in his car.

The detective shook his head and produced a stick of chewing gum instead.

The detective introduced himself and shook hands briefly, no commitment evident on either side.

The detective shook his head as he turned to the men about him.

The detective shook his head and stepped back to the bluff.

The detective would slightly shake his head or tell the witness to try again.

The detective took a few steps towards the door; turned as if remembering his manners, and shook hands.

A third detective joined them and shook his head.