The binding legal principles established are: (1) Evidence of trap witnesses, including police officers involved in trap operations, must be treated with caution as they have a motive to ensure the trap succeeds which may outweigh their regard for truth; (2) The broader definition of 'trap' from S v Ohlenschlager applies - a trap is any person who participates in planning and execution of a proposed criminal offence with a view to convicting the offender, not merely those who propose the criminal conduct; (3) Trap operations must be conducted with the greatest care to ensure they are fair, and verbal persuasion should not be used; (4) Where a trap is haphazardly arranged such that the possibility of planted evidence cannot be ruled out, and where there are material inconsistencies in trap witnesses' evidence, the appellant's alternative explanation cannot be dismissed as not reasonably possibly true; (5) Where there is doubt whether guilt has been proven beyond reasonable doubt, that doubt must be resolved in favour of the liberty of the accused.