Where drugs are seized in multiple discrete items (tablets, powders), each item containing a different drug of dependence mixed with other substances, separate trafficking counts may be laid for each drug provided no item is counted more than once — this is not the impermissible double counting identified in R v Ahmed. The statutory phrase 'mixed with another substance' in s 70 of the DPCS Act refers to physical mixing to create a composite substance, not to the circumstance where separate tablets containing different drugs are found together in a bag. DNA evidence that merely fails to exclude an individual without an accompanying likelihood ratio is wholly lacking in probative value and should be ruled inadmissible.
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