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- The presumption of innocence is the fundamental principle of criminal law stating that an accused person is presumed innocent until proven guilty in a court of law.
- The legal doctrine traces back to the Roman legal maxim 'ei incumbit probatio qui dicit, non qui negat', placing the burden of proof on the party making the accusation.
- Viscount Sankey canonized the principle as the 'golden thread' of criminal law in the landmark English House of Lords judgment Woolmington v DPP (1935).
- The principle is recognized globally under Article 11(1) of the Universal Declaration of Human Rights (1948) and Article 14(2) of the International Covenant on Civil and Political Rights (1966).
- In India, the Supreme Court has interpreted the presumption of innocence as an essential aspect of the fundamental Right to Life and Personal Liberty guaranteed under Article 21.
- Article 20(3) of the Indian Constitution reinforces this doctrine by guaranteeing the fundamental right against self-incrimination: no accused person can be compelled to testify against themselves.
- In criminal trials, the legal burden of proof (onus probandi) rests permanently on the prosecution to prove every element of the crime beyond a reasonable doubt.
- The standard of proof in criminal trials—beyond reasonable doubt—is far higher than the civil standard of preponderance of probabilities.
- Statutory provisions under Section 101 of the Indian Evidence Act, 1872 (Section 104 of the Bharatiya Sakshya Adhiniyam, 2023) mandate that whoever asserts facts must prove them.
- Sir William Blackstone articulated the ethical philosophy behind the doctrine in 1769: 'It is better that ten guilty persons escape than that one innocent suffer.'
- The Supreme Court of India in Babu v. State of Kerala (2010) affirmed that the presumption of innocence is a human right that stays with the accused until final conviction.
- When a trial court acquits an accused person, the initial presumption of innocence is strengthened into a 'double presumption of innocence' on appellate review.
- The doctrine forms the foundation of bail jurisprudence: 'Bail is the rule, jail is the exception', established by Justice V.R. Krishna Iyer in State of Rajasthan v. Balchand (1977).
- Reverse burden clauses are statutory exceptions enacted by Parliament for specific socio-economic crimes, requiring the accused to prove innocence regarding specific facts.
- Reverse burden mechanisms exist in special laws, including Sections 35 and 54 of the NDPS Act, 1985, and Section 24 of the Prevention of Money Laundering Act (PMLA), 2002.
- Under Sections 29 and 30 of the POCSO Act, 2012, once the prosecution proves the foundational act of assault, the court presumes the guilt and mental state of the accused.
- In Noor Aga v. State of Punjab (2008), the Supreme Court ruled that the prosecution must establish foundational facts beyond reasonable doubt before a statutory reverse burden can be activated.
- The presumption prevents pre-trial prejudice, media trials, and unjustified custodial detention, ensuring equal procedural balance between the state apparatus and the individual citizen.
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