The Republic vs Nicholaus s/o Ibrahim Mazengo @Nicholaus and Martine s/o Emily Masimba @Mathia (Criminal Sessions Case No. 29094/2025) [2026] TZHC 471 (24 February 2026)

TanzLII

Automated Summary

Key Facts

Two offenders, Nicholaus Ibrahim Mazengo and Martin Emily Masimba, were convicted of manslaughter under sections 195 and 198 of the Penal Code, Cap 16 R.E. 2022. The incident occurred on 12 October 2025 in Mpwayungu Village, Chamwino District, Dodoma Region, where both offenders and the victim, Mariam D/O Malugu Chidinye, were residents. During a consensual sexual encounter while intoxicated, the offenders demanded carnal knowledge against the order of nature, leading to a fight. The victim sustained head injuries, survived eight days, and died at Dodoma Regional Referral Hospital. Both offenders pleaded guilty to manslaughter, were first-time offenders, and had no prior criminal records. The court considered mitigating factors including guilty pleas, first-offense status, dependents (twins, wife, and other family members), and time spent in remand custody (10 months for Nicholaus, 6 months for Martin). Aggravating factors included the unlawful termination of the victim's life, lack of assistance after the injury, and fleeing the village. The court reduced the maximum sentence of ten years for medium-level manslaughter by three years for guilty pleas and two years for first-offense status, resulting in a five-year imprisonment sentence for each offender, effective from 24 February 2026.

Issues

  • The court considered the mitigating effect of the offenders' immediate guilty pleas, which typically qualify for leniency as per precedents like Bernadeatha Paul vs Republic. The plea of guilty was weighed against the maximum penalty, leading to a reduction of 3 years from the medium-level manslaughter sentence range.
  • The court evaluated the application of the Tanzania Sentencing Guidelines 2023 to determine if they mandate a reduction in the maximum life imprisonment for manslaughter under sections 195 and 198 of the Penal Code. The guidelines emphasize balancing aggravating and mitigating factors to ensure consistent and appropriate sentencing.
  • The court addressed whether the offenders' status as first-time offenders warranted further sentence reduction. Citing cases like Mavuta vs Republic, the court reduced the sentence by 2 additional years, acknowledging their lack of prior criminal records and the principle against imposing maximum sentences on first offenders.
  • The court assessed aggravating factors (e.g., victim's death from head injuries, offenders fleeing the scene) against mitigating factors (e.g., drunk state of all parties, no lethal weapons used, dependents). The analysis led to a 5-year sentence, reflecting the medium-level manslaughter category and the combined effect of mitigation.

Holdings

The court convicted Nicholaus Ibrahim Mazengo and Martine Emily Masimba of manslaughter under sections 195 and 198 of the Penal Code, Cap 16 R.E. 2022. It reduced their sentences from the maximum ten years to five years imprisonment each, citing mitigating factors including their guilty pleas, first-offender status, and time served in remand custody. The ruling emphasized the application of the Tanzania Sentencing Guidelines 2023, balancing aggravating factors (e.g., causing death during a fight after consensual intercourse while drunk) with mitigating ones (e.g., no prior criminal records, dependants, and remorse).

Remedies

Each offender is to serve five years imprisonment starting from 24th February 2026.

Legal Principles

  • The Tanzania Sentencing Guidelines 2023 were applied to balance aggravating and mitigating factors, ensuring consistency. The court emphasized the need to weigh first-offender status, remand time served, and the victim's survival period against the offense's severity.
  • The court interpreted the phrase 'liable to imprisonment for life' in section 198 of the Penal Code as a maximum sentence, not a mandatory one, citing the Nyamhanga s/o Magesa vs Republic case. This allows judicial discretion to impose a sentence below life imprisonment for manslaughter, as the wording does not require the stated penalty.
  • The court recognized pleading guilty as a mitigating factor, reducing sentences by 3 years for both offenders. This aligns with precedents like BERNADETHA PAUL VS REPUBLIC and FRANCIS CHILEMA VS REPUBLIC, which emphasize that guilty pleas demonstrate contrition and warrant leniency.

Precedent Name

  • Nyamhanga s/o Magesa vs Republic
  • Majeshi John Kizengele vs Republic
  • BERNADETHA PAUL VS REPUBLIC
  • Mavuta vs. Republic
  • Frodius Protazi vs Republic

Cited Statute

  • Tanzania Sentencing Guidelines 2023
  • Penal Code, Cap 16 R.E. 2022

Judge Name

E.E. Longopa

Passage Text

  • This court proceeded to find the offenders guilty of the offence hence convicted each of them for manslaughter contrary to section 195 and 198 of the Penal Code, Cap 16 R.E. 2022 on own plea of guilty having so pleaded and admitted to all facts of the case narrated by the prosecution.
  • The relevant sections dealing with this offence provides for the maximum sentence for the offence of manslaughter... the only sentence provided for in the Penal Code on the offence of manslaughter is the maximum sentence of life imprisonment.
  • Having deducted total of five (5) years from maximum penalty in medium level manslaughter, it is the inclination of this court that the remaining five years are appropriate sentence to be imposed on the offenders.