A suspect has made a chilling confession of how the murder of Kiru High School Principal Solomon Mwangi was executed.

Late last year, Mwangi was reported missing but his body was later found in a bush in Kiambu County.

The suspect, Joseph Kariuki Njuguna alias Karis, stunned the court after he confessed of taking part in Mwangi's murder after the victim's wife Jane Muthoni promised him Sh400,000 as payment.

In a 10-page confession, read out at Kiambu High Court by State Counsel Catherine Mwaniki on Tuesday, January 31st, 2017, Njuguna (who pleaded guilty to a lesser charge of manslaughter before Judge Joel Ngugi) said:

"In June last year, I received a call from a lady identified as Damaris whom I have known for a long time informing me of a well-paying job."

As reported by the Nation, Damaris told him that someone named Njiru would call him later with details about the job. Njiru called a day later and asked to meet him at Tree Shade Hotel in Kimbo, Kahawa, where Njuguna found him in the company of Damaris.

They disclosed to him that the headteacher’s wife, introduced to him only as Mwalimu, was the one behind the execution plot, and that she had made a Sh100,000 down payment.

He said that on November 4th, 2016, himself and another man known only as Gikuyu met at Texas Bar in Kiria-ini, Murang'a, where they were joined by Njiru and Mwalimu, who informed them she had a new plan of poisoning her husband.

A day later, Mwalimu called them with instructions that they meet at Urithi near Ndarugo, where she drove in with her unconscious husband.

Njuguna and Gikuyu boarded the car which they drove to a forest where Gikuyu put a sisal rope around Mwangi’s neck and removed him from the car.

He says they left Mwalimu behind as they took their victim deep into the bush where they tied his hands, tightened the rope on his neck and hanged him on a tree. He was later found dead.

Njuguna added that when they returned where they had left the car, Mwalimu had disappeared without paying the balance of Sh300,000.

By that moment, the phone she was using during the deal had been switched off.