Appreciation of evidence–Statement of PW who acted as an under-cover officer without permission of competent authority under S. 24 of Control of Narcotics Substances Act, 1997, is admissible and whether he was an accomplice not worth of Credit–Objection of–Held: PW did not have written permission to act as an under cover officer–But this is an enabling provision catering to primarily different situation–Noncompliance would not make evidence inadmissible provided it is otherwise admissible under Qanun-e-Shahadat Order–Further .held: Evidence of accomplice concerned–Court has to consider that aspect in facts and circumstances of each case–Police and Anti-Narcotic Force are obliged to resort to such techniques which cannot be taken exception to, unless some Malice is shown or prejudice is proved on record.