Another suspect has been arrested following the Joyce Wambui.
Alex Musee Ngui, unemployed and a standard three dropout,
was arrested on Tuesday in Maua town where he was reported to have been hiding.
Flying Squad officers from Makuyu trailed the 34-year-old
and locked him up for interrogation.
Musee’s arrest brings to nine, the number of suspects arrested and questioned by the police over the murder.
He is said to have played a pivotal role in the planning and execution of the murder plot.
Central regional police chief Larry Kiyeng said they were trailing more suspects linked to the February 27 incident.
On Tuesday last week, police arrested a man believed to be the mastermind of the murder.
Morris Mutwiri, 37, was smoked out of his hideout in Embu town and taken to Gatanga for questioning.
He is the husband of Purity Wanjiru - a house help at Wambui's house.
Detectives from Makuyu, who are leading the investigations, also recovered a blood-stained hoe and metal bar.
The weapons, which were found hidden in a cupboard at Wambui's house, are believed to have been used to kill the trader.
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Mourners at the home of Thika businesswoman Joyce Wambui who was murdered on Monday, February 27, 2017. /JOHN KAMAU
Wambui was clobbered to death by criminals who did not steal anything from her Maki home in Thika.
Among the suspects who have appeared in court include Wanjiru and Wambui’s son-in-law Cyrin Chege.
Others were Vinius Mariga, Tom Kariuki, John Maina, James Munene and John Wanyoike.
The probe took a new twist after Mutwiri told investigators of a planned robbery.
The suspect, who has since confessed to the murder, said a family member had promised to pay Sh300,000 if hired men stole cash from the businesswoman.
His statement sharply contradicts that of Wanjiru who claimed that the trader was assassinated.
Wanjiru told Kirwara police that the killers had received a Sh500,000 down-payment from unnamed people to execute the mission.
She said more money would have been paid after the killers completed the assignment.
Wanjiru named four men, alleged to have been hired killers, but police investigations have revealed that the information was not credible.