Unbroken chain of custody in NDPS cases is essential; unexplained sample delay and unsafe custody can vitiate conviction.

In NDPS prosecutions, the prosecution must establish an unbroken chain of custody showing that the sample tested was the same sample seized from the accused. An unexplained delay of about three months in sending the sample for chemical examination, together with failure to prove secure custody during the intervening period, created reasonable doubt about the sample's identity and integrity. That evidentiary gap was fatal to the prosecution, and the conviction could not stand.

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Issues: Whether the prosecution's failure to promptly send the seized sample for chemical examination and to prove safe custody of the sample during the intervening period rendered the conviction under the NDPS Act unsustainable.

Analysis: The prosecution evidence showed a delay of about three months in sending the sample for testing. The record did not satisfactorily explain what happened to the sample during the intervening period or establish that it remained in proper and secure custody throughout. In an NDPS prosecution, the prosecution must prove that the sample tested was the same sample recovered from the accused, and the evidentiary link between seizure, custody, dispatch, and analysis must be reliable. Where that link is doubtful, the delay cannot be ignored and the accused is entitled to the benefit of doubt.

Conclusion: The delay in sending the sample and the failure to prove safe custody were fatal to the prosecution, and the conviction could not stand.

Ratio Decidendi: In NDPS cases, unexplained delay in dispatching seized samples for chemical examination, coupled with failure to establish secure custody and an unbroken chain of custody, creates reasonable doubt as to the identity and integrity of the sample and vitiates the prosecution case.

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