 He was junior defence counsel for Abdelbaset al-Megrahi under William Taylor QC during the Lockerbie trial at the Scottish Court in the Netherlands in 2000.He became an Advocate Depute and Senior Advocate Depute in 2003, and Queen's Counsel (QC) in 2005, and prosecuted the infamous murder case of baby Caleb Ness.He was appointed Principal Advocate Depute from 1 January 2006.