MedicoLegal Investigations Ltd.


Peter Jay was formerly a career detective with the Metropolitan Police retiring at the rank of Detective Chief Inspector. He is experienced in complex cases and notably arrested Dennis Nilsen, until recently the UK’s biggest serial killer, taking him to the Central Criminal Court (Old Bailey) for the murder of 15 young men over a five year period.

For several years he worked for the solicitors to the General Medical and Dental Councils. Cases investigated involved fraud, gross incompetence, negligence, indecency and dishonesty. In 2007 he was awarded Honorary Membership of the Faculty of Pharmaceutical Medicine in recognition of his contribution to the UK pharmaceutical industry.

PETER JAY, MFPM (Hon) MIPI, Chief Executive

Jonathan Jay previously a specialist investigator with the Army Special Investigation Branch, has worked for MLI for 12 years.

Prior to MLI he had ten years experience in the detection and prosecution of criminal offences and specialises in criminal deception/fraud investigations. He has also been trained in police investigative interview techniques.

JONATHAN JAY, MIPI, Director & Company Secretary

Dr Jane Barrett started in medicine as a general practitioner. She then worked for several research based pharmaceutical companies and a Contract Research Organisation before setting up as an independent pharmaceutical physician. She holds a master's degree in medical law, is Chairman of the British Association of Pharmaceutical Physicians and is involved in training physicians and ethics committees in clinical research matters.

DR JANE BARRETT, MBBS, AKC, FFPM, LLM, Director & Medical Advisor

Jonathan and Peter Jay are Members of the Institute of Professional Investigators

Our People

Peter Jay MFPM (Hon) MIPI

Jonathan Jay MIPI

Dr Jane Barrett MBBS FFPM LLM
Chief Medical/Legal Adviser

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