A multi-agency team comprising of officers from the Crime Research and Intelligence Bureau (CRIB), Cyber Crime, Scenes of Crime and Special Service Unit (SSU) zeroed in on Peter Mwangi Njenga alias Ole Sankale.
According to DCI, Njenga was seen at the scene of crime on March 12, 2021 with the deceased.
“The exhibits were professionally marked, packaged and presented for forensic examination. The forensic results are finally out, positively matching the suspect,” DCI says.
In a well orchestrated plan, the suspect reportedly trailed Wambua to an area she had gone to pray, with reports indicating that he interacted with her until her death.
“It was also established that the area is often visited by pilgrims for spiritual intentions. Detectives further established that the suspect preyed on deceased as she prayed, before he made his move to sexually assault her and strangle her to death,” DCI added.
This was confirmed by her autopsy done by Dr Johansen Oduor which revealed that there was sexual contact between Wambua and her killer/s.
She was later found half-naked at Vet Farm in Kajiado county.
A serial killer, rapist and ‘ex-convict’
Further digging into Njenga’s criminal records showed that he is notorious for such acts, with charges of rape, and robbery with violence, being traced back to as early as 1996.
“It was confirmed that the suspect was a jailbird. Our criminal data system was mined and indeed confirmed the suspect had committed similar offences using the same modus operandi of committing robbery and thereafter repeatedly, sexually abusing the victims by raping and killing them,” DCI explained.
‘Killer’ was sentenced to death
Retrieving records from Principal magistrates and the Prisons Service, DCI was puzzled that he had even been sentenced to death at one time but walked free.
“In January 15th 2003, he was convicted and sentenced to death at Kibera Senior Resident’s Magistrate Court. How he won his freedom remains a mystery, which the detectives are currently engaged in demystifying,” DCI said.