MR MADASA
Provided the plan was good.  The law says the plan must be good.  If it leaks negligently, it's not acceptable, it's not a good trap and it's not lawful, it's not a lawful trap.  The same happens in matters of being trapped in shebeen matters, these kind of cases, if the police go there and the trap is not good, even diamond matters when police conduct a trap, the law requires that that trap must be good.  It is rejected if it's not good and certain precautional measures have to be taken, and in this case they were not taken, and therefore that act of being negligent in this plan, the plan not being watertight, that makes it unlawful.