Nyabuga v Republic (Criminal Appeal 065 of 2020) [2026] KECA 167 (KLR)
The bottom line
#Kenya's Court of Appeal confirmed that mandatory life sentences for defilement remain lawful and appeals after a guilty plea can only challenge the sentence, not the conviction.
What this practically means
#Executive summary
#Questions the Court framed
#The issues the Court set itself to decide, in its own words.
- 1.Whether an appeal lies against conviction and sentence by an accused who pleaded guilty, given section 348 of the Criminal Procedure Code
- 2.Whether the mandatory life sentence under section 8(1) and (2) of the Sexual Offences Act is unconstitutional or illegal
- 3.Whether this Court may interfere with the severity of a sentence on a second appeal under section 361(1) of the Criminal Procedure Code
Key legal issues
#Scope of appeal following a plea of guilty
Under section 348 of the Criminal Procedure Code, a person convicted on a voluntary plea of guilty cannot appeal the conviction, but retains the right to challenge the extent or legality of the sentence.
The Court held that section 348 bars appeals against conviction where the plea is voluntary and valid. The appeal must therefore focus solely on whether the sentence was inappropriate, imposed incorrectly, or illegal. The appellant was convicted on his own plea, so only the legality of the life sentence was open to challenge.
Legality of the mandatory life sentence under section 8(1) and (2) of the Sexual Offences Act
The mandatory life sentence for defilement is lawful; the Supreme Court's decision in Republic v Joshua Gichuki Mwangi overturned Ayako v Republic, and courts must impose the prescribed mandatory sentences.
The appellant relied on Ayako v Republic, which had equated life imprisonment to thirty years. The Court held that decision was overturned by the Supreme Court in Joshua Gichuki Mwangi, which affirmed that mandatory sentences under the Sexual Offences Act are lawful, distinct from minimum sentences, and must be imposed upon conviction without judicial discretion to depart from them.
Whether this Court may interfere with sentence on a second appeal
Severity of sentence is a matter of fact barred by section 361(1); intervention is only permitted on a point of law, illegality, or wrong principle, none of which was shown.
Section 361(1) confines second appeals to points of law and bars challenges to the severity of a sentence unless the High Court improperly enhanced it or the subordinate court lacked the power to impose it. The appellant demonstrated no misapprehension of the law, illegality, or wrong principle; the sentence was the statutory minimum-mandatory prescribed by section 8(1) and (2).
Legal principles established
#- An accused convicted on his own plea of guilty may only appeal against the extent or legality of the sentence, not the conviction
- On a second appeal, severity of sentence is a matter of fact and the Court of Appeal may intervene only where the courts below acted on a misapprehension of the law or the sentence is illegal or based on wrong principles
- The mandatory sentences under the Sexual Offences Act remain lawful and courts have no discretion not to impose them upon conviction, per the Supreme Court's decision in Republic v Joshua Gichuki Mwangi
Court orders
#- 1.The appeal is dismissed in its entirety
- 2.It is so ordered
The bench
#One judgment of the whole court — no separate or dissenting opinions.
- On appeal from
- High Court of Kenya at Kisii
- Criminal Appeal No. 105 of 2009
- Jurisdiction invoked
- Second appeal under section 361(1) of the Criminal Procedure Code (appeal on a point of law only)
Relief refused
#Substitution of the life sentence with a definite term of imprisonment
The sentence is a lawful mandatory sentence under the Sexual Offences Act as affirmed by the Supreme Court, and the appellant did not demonstrate it was inappropriate or illegal
Costs
No costs order made in the judgment
Quotable passages
#Verbatim from the judgment, each located to the page it appears on in the official PDF — so these can be cited and checked directly.
The upshot of the foregoing is that this appeal is devoid of merit. Accordingly, we hereby dismiss it in its entirety.
It is so ordered.
However, the accused still retains the right to appeal the extent or legality of the sentence imposed.
The Apex Court maintained that the said sentences are not only lawful but so long as they remain in our law books, they are good law and must be imposed upon conviction.
Issues in the judgment
#The judgment does not state the number of the present appeal to the Court of Appeal, only the antecedent High Court appeal number
No costs order appears anywhere in the judgment, so the costs disposition is unrecorded
Key timeline
#Practical implications
#Frequently asked questions
#Cite this brief
#Cite this brief
Caselaw, "Nyabuga v Republic (Criminal Appeal 065 of 2020) [2026] KECA 167 (KLR)", Case Analysis (2026). Criminal Appeal (unnumbered on record; arising from High Court Criminal Appeal No. 105 of 2009). Source: https://new.kenyalaw.org/akn/ke/judgment/keca/2026/167/eng@2026-01-30
Suggested citation format for research notes or client memos. Always verify the original judgment before relying on any point.