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, internet prices, and price data from intercepted communications, 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), confirmed transactions from drugs-line call backs.
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 4000 plants) with growing conditions (planting density, light intensity, pot size).
Intercepted communications price reports and Drugs Line Orders.

Due to disability, Mr Atha has difficulties attending court in person outside a 2 hour travel window from Liverpool, however facilities exist to provide oral evidence via video link.