In February 2006, Boyd was drawn into the detective constable Shirley McKie fingerprint controversy, when she was awarded £750,000 compensation in an out-of-court settlement. As Solicitor General, Boyd was responsible for the prosecution of DC McKie after she denied an accusation by Scottish Criminal Record Office (SCRO) fingerprint officers that she left her thumb print at a murder scene in January 1997. McKie was arrested in March 1998, charged with perjury but at her trial in May 1999 the SCRO fingerprint evidence was rejected, and she was acquitted.