Jowie was however found guilty of the murder.
Justice Grace Nzioka said Jowie stole the ID, armed himself with a gun, carried a kanzu gained access, and murdered Monica Kimani.
"All this evidence leaves a strong conclusion that Irungu murdered Monica Kimani," she said.
"The prosecution has proved beyond a reasonable doubt."
Making the ruling on Friday, Justice Grace Nzioka said the prosecution has adduced sufficient evidence and has met the threshold.
"The person who killed the deceased did not intend to give her even one minute to survive. It is my considered opinion and finding that the perpetrator intended instant death," Justice Grace Nzioka said.
Nzioka said the first accused person had a 'know-how on how to kill'.
Justice Grace Nzioka said Jowie knew Monica Kimani prior to her death.
She said the issue arose because the evidence of the first accused person is, that he did not know the deceased at all prior to her death.
"It is the finding of this court, that the evidence by the first accused person that he did not know the deceased prior to her death is untenable, insincere and it is an afterthought and it is false," Justice Grace Nzioka said.
"The court finds that the first accused person was known to the deceased because they were together at Kenya Polytechnic. They were in the same class taking the same course."
Monica’s body was found at her Lamuria Gardens Apartment which is located on Kitale Lane off Denis Pritt Road in Kilimani.
Jowie and Jacque Maribe have been on trial since 2018, with the prosecution having called 35 witnesses. The defence did not call any witnesses.
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