Williams (Towards Zero)

In the novel Towards Zero, Williams is a police officer who assists Inspector Leach and Superintendent Battle in the investigation into the murder of Lady Camilla Tressilian. Among his specific duties was searching the house at Gull's Point for clues, a task which Inspector Leach said Williams was good at. Williams' rank is not given but is likely to be that of a constable.

Agatha Christie's Marple
In the 2007 ITV adaptation of the story. Williams is portrayed by Stewart Bewley. Here his forte is also searching rooms.