The Directorate of Criminal Investigations (DCI) is investigating a police officer over the murder of a colleague attached to the Central Bank of Kenya.

Police officer Ezekiel Kipkoech Tarus is in custody over suspicion of killing Raphael Kimuli Wambua in a shooting incident on February 23, 2025 in the Ruaraka area.

Wambua and his brother, Erick Ngolania Wambua, also a police officer with the General Service Unit (GSU) were out at Wasafi Bar in Ruaraka watching football and drinking until around 1:20 am when they began walking home. "At this point, they were attacked by PC Ezekiel Tarus a police officer attached at VIP protection, who is suspected to have fatally shot the deceased person, Wambua, with his Jericho pistol, serial number KP 44338440," an affidavit filed by DCI officer Suleiman Mwatajiri at Milimani law courts reads in part.  The incident was immediately reported to the Ruaraka Police Station under OB No. 03/23/02/2025.  So far, the reasons behind Kipkoech killing Wambua remain a mystery.

Following the shooting, Tarus was reportedly subjected to mob justice before being rescued by police officers from Ruaraka Police Station and rushed to Kenyatta National Hospital where he was admitted under police guard before being discharged on February 28, 2025.  Mwatajiri told Chief Magistrate Lucas Onyina on Monday that their office has since launched a thorough investigation into the circumstances surrounding Wambua's death.  In an affidavit filed before the court, the detective underscored the urgency of detaining Tarus for further questioning and conducting a mental health evaluation.   "The respondent is suspected to have been involved in the murder of one Wambua," Mwatajiri stated in the application.