The court hearing and disappearance
Willie Kimani worked as a human-rights lawyer with International Justice Mission. On June 23, 2016, he accompanied client Josephat Mwenda to court in a matter arising from Mwenda's complaint against police officer Fredrick Leliman. Taxi driver Joseph Muiruri transported them.
After the hearing, the three men disappeared. Civil-society organizations quickly raised alarm about an enforced disappearance involving Administration Police officers. Their bodies were recovered days later. This page omits the graphic forensic details while preserving the central fact that all three were unlawfully killed.
The motive found by the court
The prosecution argued that Leliman had a motive to silence Mwenda because Mwenda had complained to the Independent Policing Oversight Authority about an earlier shooting and alleged police abuse. The trial court accepted that motive as part of its findings against Leliman.
Willie Kimani and Joseph Muiruri were not merely incidental names in the case file: the court convicted the responsible defendants for three separate murders. The prosecution relied on witness evidence, communications and location data, physical and forensic material, and evidence about the unlawful detention and movement of the victims.
The 2022 verdicts
On July 22, 2022, Justice Jessie Lessit convicted police officers Fredrick Leliman, Stephen Cheburet and Sylvia Wanjiku, together with civilian police informer Peter Ngugi, on all three counts of murder. Police officer Leonard Mwangi was acquitted on all three counts.
The acquittal matters. It is prohibited editorially to describe Mwangi as a convicted participant after the court found the prosecution had not proved the murder charges against him.
The 2023 sentences
On February 3, 2023, Leliman received a death sentence on each murder count. Cheburet received 30 years' imprisonment, Wanjiku 24 years and Ngugi 20 years, with the relevant custodial terms structured according to the sentencing judgment.
Defence lawyers said after sentencing that appeals would be pursued. In the sources reviewed for this page, no later appellate judgment overturning the murder convictions was located. The archive therefore records the trial convictions and sentences as the controlling adjudicated outcome while avoiding a claim that every conceivable appellate step is complete.
Why the case matters
The murders became a major test of police accountability in Kenya. Willie Kimani was representing a client alleging police abuse when he, his client and their driver were themselves abducted and killed. The eventual convictions were widely described by Kenyan and international rights organizations as a significant accountability milestone.
That wider significance does not erase the individual legal distinctions in the case: four people were convicted of murder, one co-accused was acquitted, and allegations against other people are not treated as proven unless supported by a judgment.
Timeline
June 23, 2016: Willie Kimani, Josephat Mwenda and Joseph Muiruri disappear after leaving Mavoko Law Courts.
July 2016: police officers are charged in connection with the triple murder; a civilian suspect is later added.
September 20, 2021: the High Court rules that the accused have a case to answer and places them on their defence.
July 22, 2022: Leliman, Cheburet, Wanjiku and Ngugi are convicted of all three murders; Leonard Mwangi is acquitted.
February 3, 2023: Leliman is sentenced to death; Cheburet, Wanjiku and Ngugi receive prison terms of 30, 24 and 20 years respectively.
August 27, 2026 review: no later appellate judgment overturning the convictions was identified in the sources reviewed for this page.