A dark blue carbon-wrapped package. [13] The said package was weighed and subjected to a Trunac test, which returned a positive result for ketamine. The exhibits were duly marked, sealed, and handed over to the Investigating Officer. The exhibits were subsequently sent to the chemist for analysis. The chemist (SP1) confirmed that the substance was ketamine with a net weight of 2,376 grams. [14] At all material times, the prosecution’s evidence was that P14 and its contents remained under the control and custody of PW4 until they were properly handed over to the Investigating Officer. The Issues [15] In essence, the Appellant raised three principal grounds: i. An alleged break in the chain of evidence; ii. The alleged inadequacy of the investigation; and iii. An alleged misdirection by the learned High Court Judge in evaluating the defence, particularly the defence of innocent carrier. [16] The Respondent, in its submissions, contended that these arguments were devoid of merit and that the real question before this Court is whether the defence had succeeded in raising a reasonable doubt in light of the earlier finding of a prima facie case by a coordinate Court of Appeal. Our Findings [17] At the outset, we must emphasise that the Appellant is precluded from re-litigating issues relating to the establishment of a prima facie case. The earlier decision of the Court of Appeal, which ordered the Appellant to enter his defence, necessarily entailed a finding that all the essential elements of the charge had been established. [18] We are guided by the case of Manimaran a/l Amas v Public Prosecutor [2015] 1 MLJ 18, where the Court of Appeal held that once an accused is called to enter his defence, it necessarily means that all the ingredients of the charge have been established. [19] This principle has also been echoed in PP v Sulaiman bin Saidin [2010] 3 MLJ 383 and Suhailah binti Abdullah v PP [2018] MLJU 1353, which reinforce that the inquiry post-defence is limited in scope where it was held that when the Court of Appeal had made a finding of prima facie what is left to be considered is just whether the accused has successfully cast a reasonable doubt on the prosecution’s case. [20] In such circumstances, the appellate inquiry at this stage is confined to whether the defence has raised a reasonable doubt. It is not open to this Court, being a court of coordinate jurisdiction, to revisit or overturn those earlier findings in the absence of a proper review application. [21] We will now address the issues raised by the Appellant. Alleged Break in Chain of Evidence [22] We find no merit in the Appellant’s contention that there was a break in the chain of custody. The Appellant argued that there existed a gap of approximately two hours during which the whereabouts of P14 were unaccounted for and the exhibits, including the impugned drugs, had yet to be marked, thereby casting doubt on the identity of the substances subsequently analysed by the chemist. [23] It is clear from the evidence that P14 was searched in the presence of the Appellant after the Appellant had been brought back from the remand process. Hence, there is no issue of gap in the chain of evidence nor the identity of the drug seized in dispute. [24] The evidence, when considered in its totality, does not disclose any material break in the chain of custody nor does it give rise to any reasonable doubt as to the integrity or identity of the exhibits sent for analysis. [25] We find that the evidence of SP4, the Raiding Officer, is pivotal. SP4 was the officer directly responsible for the initial observation, detention, inspection, and handling of the Appellant prior to his handover to the Investigating Officer, SP6. [26] Upon a careful evaluation of the evidence of SP6, we are satisfied that at all material times, from the moment of arrest until the completion of the marking of exhibits at the KLIA Enforcement Office, the handling of the exhibits remained continuous and unbroken. The exhibits, together with the Appellant, were never left unattended or unsupervised. [27] We further find that there was no break in the chain of custody from the point of handover by SP4 to SP6 until the exhibits were delivered to the Chemistry Department for analysis. Upon their return, duly sealed by the chemist, the exhibits were safely deposited with the store officer, SP2. Thereafter, the exhibits remained securely preserved and were only removed for production in court. The chemist (SP1) confirmed that the seals remained intact and in good condition. In the circumstances, we are satisfied that the integrity of the exhibits was fully preserved and that the chain of custody remained intact throughout. [28] In any event, given that a prima facie case had already been established we find the defence failed to raise any reasonable doubt on this issue. This ground does not avail the Appellant.