Cathy Jackson is an officer in the Borders and Lothian Police Force, stationed at Waverly Road. She was born in roughly 1960, and has thick, short brown hair and a long, straight ski-slope of a nose.

At the end of april, 1988, Cathy was working on the Edinburgh Strangler case. She was awaiting the post mortem results of the first two victims when she met John Rebus in the canteen. She invited him to a party at her house. Also invited to the party were Jim Stevens and Gill Templer. During the party she danced and kissed a large man, and ended up having sex with him in a bed under a pile of coats.