Professor Gary Macpherson is a consultant forensic clinical psychologist and professor of psychology and law and former head of forensic psychology services for the State Hospital Board for Scotland. 

Professor Macpherson was cited by the President of the Supreme Court as '...Scotland's leading forensic psychologist' and was honoured with a fellowship for 30 years of expert evidence to the courts.  

Professor Macpherson accepts instruction in criminal and civil cases and from professional bodies including the SSSC, HCPC, BPS, & GMC. He is an expert to the International Criminal Court, The Hague. He has published books and guidelines on expert evidence including:

Expert Evidence. In Forensic Psychology, Crime and Policing: Key Issues and Practical Debates. Bristol University Press. (2023)

Craig, L, Macpherson G et al (2021). Psychologists as Expert Witnesses. Best Practice Guidelines for Psychologists. British Psychological Society