Nyambega alias Bobu v Republic (Criminal Appeal 371 of 2019) [2026] KECA 596 (KLR)
The bottom line
#Kenya's Court of Appeal confirmed that mandatory life sentences for defilement remain lawful, and second appeals cannot challenge how harsh a sentence is.
What this practically means
#Executive summary
#Questions the Court framed
#The issues the Court set itself to decide, in its own words.
- 1.Whether the life imprisonment sentence imposed under section 8(2) of the Sexual Offences Act was harsh, excessive and unconstitutional as a mandatory sentence
- 2.Whether the courts below erred in failing to consider the appellant's mitigation, his status as a first-time offender, and sections 216 and 329 of the Criminal Procedure Code
- 3.Whether section 333(2) of the Criminal Procedure Code on time spent in custody should apply
Key legal issues
#Scope of second appeal jurisdiction on sentence
Severity of sentence is a matter of fact, not law; the Court will not interfere absent a showing that no reasonable tribunal could have reached the conclusion.
Section 361(1) of the CPC confines a second appeal to questions of law. An appellate court must be loyal to the factual findings of lower courts and resist treating findings of fact as holdings of law. Interference is warranted only where the decision is bad in law or no reasonable tribunal could have reached it, following M'Riungu v Republic.
Constitutionality of the mandatory life sentence under section 8(2) of the Sexual Offences Act
The life sentence under section 8(2) SOA is lawful and constitutional; the trial court had no discretion to depart from it.
Relying on the Supreme Court's decision in Republic v Mwangi; ISLA (Amicus Curiae), the Court held that sentencing parameters are set by Parliament, not the Judiciary, and the mandatory sentences under sections 8(2), 8(3) and 8(4) of the SOA remain valid unless declared unconstitutional. The Court of Appeal had no jurisdiction to interfere with the sentence.
Discretion to interfere with sentence on appeal
The appellate court may only interfere where the trial court acted on wrong principles, overlooked material facts, or the sentence is manifestly excessive.
Sentencing discretion reposes in the trial court. Following Bernard Kimani Gacheru v Republic, the fact that the appellate court might itself have imposed a different sentence is not sufficient ground for interference. The appellant's grounds - mitigation, first-offender status, and section 333(2) CPC - did not establish any of the recognised grounds for interference.
Legal principles established
#- On a second appeal, the Court of Appeal's jurisdiction is confined to matters of law and it must be loyal to the findings of fact by the lower courts.
- A sentence prescribed by section 8 of the Sexual Offences Act is lawful and courts have no jurisdiction to interfere with it unless the statute is declared unconstitutional on sound principles.
- An appellate court will not interfere with a lawful sentence unless the trial court acted on wrong principles, overlooked material facts, or the sentence is manifestly excessive.
Court orders
#- 1.The appeal is dismissed in its entirety
- 2.The conviction and sentence of life imprisonment imposed by the trial court and upheld by the first appellate court stand
The bench
#One judgment of the whole court — no separate or dissenting opinions.
- On appeal from
- High Court of Kenya at Migori
- Jurisdiction invoked
- Section 361(1) of the Criminal Procedure Code - second appeal confined to matters of law
Relief refused
#Reduction or setting aside of the life imprisonment sentence
The appellant failed to establish grounds for interference with the sentence; the sentence under section 8(2) SOA remains lawful per the Supreme Court's decision in Republic v Mwangi
Costs
No costs order made in this criminal appeal.
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.
we find that the appellant has not established any grounds upon which this Court can interfere with his sentence. Consequently, we find and hold that the appeal lacks merit and is dismissed in its entirety.
under section 361(1) of the CPC, our jurisdiction is circumscribed to matters of law and severity of sentence is a matter of fact, not law.
We reiterate that the Court of Appeal had no jurisdiction to interfere with that sentence.
Issues in the judgment
#The appellant's name and case number are not stated in the judgment text provided; the title and case number fields are inferred from context and may require verification against the official judgment.
Key timeline
#Practical implications
#Frequently asked questions
#Cite this brief
#Cite this brief
Caselaw, "Nyambega alias Bobu v Republic (Criminal Appeal 371 of 2019) [2026] KECA 596 (KLR)", Case Analysis (2026). Criminal Appeal 47 of 2018. Source: https://new.kenyalaw.org/akn/ke/judgment/keca/2026/596/eng@2026-03-13
Suggested citation format for research notes or client memos. Always verify the original judgment before relying on any point.