The telling error

Stuck in a traffic jam, Nicki Clements sees a face she hoped never to see again. It's definitely him, the same police officer, stopping each car on Elmhirst Road. Keen to avoid him, Nicki does a u-turn and makes a panicky escape - or so she thinks. The next day, Nicki is pulled in for questioning in connection with the murder of Damon Blundy, controversial newspaper columnist and resident of Elmhirst Road. Nicki can't answer any of the questions detectives fire at her. She has no idea why the killer used two blunt knives in a way that involved no spilling of blood, or why 'he is no less dead'…