What is difference between standard of proof in deciding criminal appeal against acquittal and conviction?

 In criminal law, appellate courts apply distinct standards when deciding appeals against conviction versus appeals against acquittal, primarily because an acquittal reinforces the fundamental presumption of innocence. While both appeals allow for a review of evidence, an appeal against acquittal faces a higher threshold for interference compared to a standard appeal against conviction. 

Here is the detailed difference:

1. Appeal Against Conviction 

• Initial Presumption: The presumption of innocence is lost once a trial court finds the accused guilty. The trial court's finding provides a initial presumption of guilt, which the accused must overcome to win the appeal.
• Standard of Review: The appellate court reviews the evidence to see if it sustains the conviction beyond a reasonable doubt. The focus is on finding legal or factual errors in the conviction.
• Interference Level: Lower. If the appellate court finds that the prosecution failed to prove the case beyond reasonable doubt, or there is a strong possibility of innocence, it will set aside the conviction.
• If Two Views Are Possible: If the evidence is equally balanced, the appellate court may still interfere to give the benefit of doubt to the accused. 

2. Appeal Against Acquittal (Appeal to Convict)

• Double Presumption of Innocence: When an accused is acquitted, the initial presumption of innocence is reinforced, reaffirmed, and strengthened by the acquittal verdict. This creates a "double presumption" of innocence.
• Standard of Review: The appellate court can re-appreciate the entire evidence, but it will only interfere if the acquittal is "perverse," "unreasonable," or "distorted".
• Interference Level: High Threshold. Interference only occurs when there are "substantial and compelling reasons" (e.g., ignoring material evidence, or a gross error of law).
• If Two Views Are Possible: If two reasonable views can be reached from the evidence—one pointing to guilt and the other to innocence—the appellate court must not disturb the acquittal. 

Summary of Differences

Feature	Appeal Against Conviction	Appeal Against Acquittal
Presumption	Presumption of guilt	Double presumption of innocence
Interference Threshold	Normal	High (Perversity/Substantial Error)
If Two Views Possible	Can favor the accused (Conviction reversed)	Must favor the accused (Acquittal upheld)
Role of Court	Correction of errors	Correction of miscarriage of justice
Re-appreciation	Normal appreciation	Studied, deeper scrutiny

Conclusion

An appeal against acquittal is "altogether on a different pedestal". The appellate court must remain cautious, as reversing an acquittal takes away the liberty of a person who has already been declared not guilty by a court of law. The court must act only if it is "imperative" to prevent a gross miscarriage of justice.

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