Kenya Case Law

Republic v Muchene

Republic v Muchene (Criminal Case E001 of 2022) [2026] KEHC 11049 (KLR) (21 July 2026) (Judgment)

Court

High Court

Case number

Criminal Case E001 of 2022

Judge

["AK Ndung'u"]

The prosecution proved beyond reasonable doubt that the accused unlawfully inflicted the fatal head injuries on the deceased with a metal rod, and malice aforethought was inferred from the repeated blows to the head, the lethal nature of the force used, the concealment of the weapon, and the accused's flight. The insanity defence failed because no medical or other credible evidence showed that, at the time of the attack, the accused was incapable of understanding her actions or knowing they were wrong; mere memory loss and asserted depression were insufficient.

Source excerpt

• Murder
• Malice aforethought
• Identification parade
• Circumstantial evidence
• Dna evidence
• Insanity defence

Republic v Ruto

Republic v Ruto (Criminal Case E10 of 2023) [2026] KEHC 9430 (KLR) (30 June 2026) (Sentence)

Court

High Court

Case number

Criminal Case E10 of 2023

Judge

["TM Matheka"]

The accused did not establish that he suffered from mental illness at the time of the offence. The earlier psychiatric impression was not confirmed by later reports, no treatment records or contemporaneous medical evidence were produced, and insanity was not raised and tested at trial. On the proven facts, the murder involved severe aggravating features including strangulation, injury, kidnapping, concealment of the body, and ransom/extortion conduct. Those aggravating factors outweighed mitigation, justifying a maximum custodial sentence of 35 years.

Source excerpt

• Murder sentencing
• Insanity defence
• Mental fitness to plead
• Aggravating and mitigating factors
• Custodial sentence
• Pre-sentence report

Karanja v Republic

Karanja v Republic (Criminal Appeal E063 of 2025) [2026] KEHC 8880 (KLR) (18 June 2026) (Judgment)

Court

High Court

Case number

Criminal Appeal E063 of 2025

Judge

["GL Nzioka"]

The appeal failed because the appellant did not prove insanity on a balance of probabilities, and the record showed deliberate, violent conduct inconsistent with incapacity or self-defence. The prosecution evidence proved two unlawful assaults causing grievous harm, and the lawful sentence imposed was justified by the seriousness of the injuries and the statutory maximum under section 234.

Source excerpt

• Grievous harm
• Insanity defence
• Self-defence
• Burden of proof
• First appellate review
• Concurrent sentences

Republic v Marwa

Republic v Marwa (Criminal Case 10 of 2019) [2026] KEHC 8235 (KLR) (11 June 2026) (Judgment)

Court

High Court

Case number

Criminal Case 10 of 2019

Judge

["AK Ndung'u"]

The court held that the prosecution proved all elements of murder beyond reasonable doubt. The deceased died from multiple gunshot wounds inflicted by the accused, whose direct and corroborated conduct showed a deliberate and repeated shooting with a G3 rifle after a confrontation over duty assignment. Malice aforethought was inferred from the weapon used, the number and location of shots, the pursuit of the fleeing deceased, and the accused's post-offence statements admitting the killing. The insanity defence failed because the evidence did not show that the accused was mentally incapacitate…

Source excerpt

• Murder
• Malice aforethought
• Insanity defence
• Identification by eye witness
• Post-mortem evidence
• Firearms evidence

Mwangi v Republic

Mwangi v Republic (Criminal Appeal E072 of 2024) [2026] KEHC 8010 (KLR) (9 June 2026) (Judgment)

Court

High Court

Case number

Criminal Appeal E072 of 2024

Judge

["JM Chigiti"]

The court found that the plea of guilty was properly taken in Kiswahili, the appellant admitted the facts, and no evidence supported the insanity claim. Although the offence carried a much higher statutory penalty, the trial court had already exercised leniency by imposing two years after a negative probation report. However, considering the appellant had served a substantial portion of the sentence and the constitutional and statutory framework allowing non-custodial options where suitable, the court ordered release subject to a community service officer's inquiry and report.

Source excerpt

• Appeal against sentence after guilty plea
• Possession of cannabis
• Community service order
• Probation sentence
• Reduction of custodial sentence
• Plea taking

Kuria v Director of Public Prosecution

Kuria v Director of Public Prosecution (Criminal Appeal E099 of 2025) [2026] KEHC 8072 (KLR) (8 May 2026) (Judgment)

Court

High Court

Case number

Criminal Appeal E099 of 2025

Judge

["S Mbungi"]

The trial court failed to properly determine the appellant’s criminal responsibility at the time of the offences despite evidence of psychiatric assessment, committal to Mathare Mental Hospital, and a pleaded defence of mental illness. Because insanity went to the root of criminal liability and was not adequately considered, the conviction was unsafe and had to be quashed. The appellate court therefore substituted a finding of guilty but insane and ordered probation with counselling and medical support.

Source excerpt

• Arson
• Grievous harm
• Assault
• Resisting arrest
• Insanity defence
• Criminal responsibility

Republic v Joseph

Republic v Joseph (Criminal Case 28 of 2019) [2026] KEHC 5801 (KLR) (30 April 2026) (Ruling)

Court

High Court

Case number

Criminal Case 28 of 2019

The High Court found the prosecution had established a prima facie case of murder and ordered the accused to enter his defence under section 306(2).

• Murder
• Mens rea
• Insanity defence
• Prima facie case
• Prima-facie-case
• Mens-rea

DKM v Republic

Court

Court of Appeal

Case number

Criminal Appeal 26 of 2006

Judge

["PK Tunoi", "EO O'Kubasu", "EM Githinji"]

The Court of Appeal set aside DKM’s manslaughter conviction, entered a special finding of guilty but insane, and ordered him committed to Mathari Mental Hospital.

• Manslaughter
• Insanity defence
• Fitness to plead
• Special finding under section 166 cpc
• Standard of proof for insanity
• Alibi defence

Amani David Dena v Republic

Court

Court of Appeal

Case number

Criminal Appeal 53 of 1998

Judge

["ZR Chesoni", "JE Gicheru", "AB Shah"]

The Court of Appeal held that the trial was a mistrial because sections 162 and 166 of the Criminal Procedure Code were confused, and ordered a retrial.

• Murder
• Insanity defence
• Fitness to plead
• Special finding under section 166
• Retrial
• Burden of proof

Richard Kaitany Chemagong v Republic

Court

Court of Appeal

Case number

Criminal Appeal 150 of 1983

Judge

["AA Kneller", "ARW Hancox", "JO Nyarangi"]

The Court of Appeal held that Chemagong proved epilepsy and was legally insane when he killed the deceased, so the conviction and death sentence were quashed.

• Insanity defence
• Epilepsy as disease of the mind
• Special finding under section 166(1) criminal procedure code
• Burden and standard of proof for insanity
• Appeal against conviction and death sentence
• Insanity-defence