Murder Ring — Leigh Russell

Hearing footsteps pounding along the street behind him he glanced back, fleetingly worried, then laughed because the street was deserted. All the same, he felt uneasy. Everything looked different in the dark.
Then he heard more footsteps approaching, and a hoarse voice called out.
Turning his head, he made out a figure hovering in the shadows and as it raised one arm, the barrel of a gun glinted in the moonlight

The dead body of unassuming David Lester is discovered in a dark side-street, and DI Geraldine Steel is plunged into another murder investigation. The clues mount up along with the suspects, but with the death of another man in inexplicable circumstances, the case becomes increasingly complex. As Geraldine investigates the seemingly unrelated crimes, she makes a shocking discovery about her birth mother.