A postmortem examination conducted by government pathologist Titus Ngulungu revealed that the cleric was severely tortured before he died.
The examination showed that his attackers forcefully tied his hands and legs together before torturing him to death.
According to the pathologist, the pastor sustained serious wounds to the head and neck caused by a blunt object.
He explained that Ndumia had deep injuries on both the front and back of the head, including a large cut at the back that caused brain damage and a skull fracture.
The report further indicated that the pastor may have been strangled.
Injuries found on the front part of his neck suggested that pressure had been applied, interfering with his breathing during the attack. Internal bleeding was also discovered during the examination.
The killing happened in the early hours of May 4 at the PCEA Tabuga Parish compound in Lanet, Bahati.
The incident has shocked residents and members of the church, with family members describing the slain pastor as a humble servant of God who was dedicated to helping the community.
Speaking after the release of the postmortem report, the pastor’s brother in law, Francis Mwangi, said the family was heartbroken by the brutal murder.
He noted that they were satisfied with the findings and appreciated the efforts made by detectives handling the case.
Mwangi urged security agencies to speed up investigations and ensure those responsible are arrested and prosecuted.
He described Ndumia as a respected church leader and a caring man who served people faithfully.
The case has also attracted attention from Bahati Member of Parliament Irene Njoki, who called for thorough investigations into the killing.
She acknowledged that the area has recently experienced rising insecurity, including murder cases, and assured the family that leaders were pushing for justice to be served.
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