CASE 2 – Demolishing the analytical chemist’s evidence in a “drug” case
Demolishing the analytical chemist’s evidence in a “drug” case
In a case in which my client was charged with being in illegal possession of a scheduled substance, I cross-examined the scientist who analysed the substance at the Government Pathology Laboratories and he soon admitted under my cross-examination, that his chemical analysis only reflects the percentage composition of the substance in terms of carbon, hydrogen, oxygen, nitrogen and sulphur, and that he is unable to identify a particular isomer of the substance. (Isomers are two or more chemical compounds with the same chemical composition, and molecular weight, but differing in at least one physical or chemical property). He conceded that different isomers are indeed different chemical compounds, despite identical chemical analysis, and that he cannot possible tell the court anything about the real identity of the substance that he analysed.
After just more than an hour in court my client left the court a free man