Over 30 years experience as an expert witness in the UK Courts, consulted on over 3000+ cases. Your one stop shop for cases involving all types of controlled drugs.

Not a former police officer, Mr Atha approaches cases from a scientific and statistical perspective. Drug consumption patterns (from surveys of over 30,000 users) for borderline personal use/intent to supply cases – placing claimed usage levels into spectrum of UK usage.

Wholesale and retail drug valuations (inc regional & postcode area prices, POCA assessments etc)

Effects of drugs (mens rea, drug driving, therapeutic uses).
Drug-driving personal injury cases.
Cannabis cultivation cases (yield, harvest interval, production capacity, methods etc).
New psychoactive substances (former legal highs) and rarely-encountered controlled drugs.
Quality/purity, drug testing methods (driving/workplace/prison/sport).
Drug paraphernalia, packaging and terminology (interpretation of communications data (inc Encrochat, Signal etc).
County Lines quantum estimated from line traffic using own evidence-based algorithm (how many deals x no of wraps per deal x wrap size).
Extensive court experience, UK-wide coverage.
Research and Consultancy on Drug Policy and Drug Markets.
Founder Member of Expert Witness Institute (EWI) and Independent Network of Drug Experts.(INDEX).

Casework databases:
Drug Powders – package sizes and purities (1994-date) for cocaine, heroin, crack & amphetamines.
Cannabis Plant Yields (over 2500 plants).
Intercepted communications price reports and Drugs Line Orders.

Mr Atha is no longer able to attend court in person outside a 2 hour travel window from Liverpool, however facilities exist to provide oral evidence via video link.