The case of Lawyer Willie Kimani and two others is expected to be ruled on Thursday by Justice Jessie Lessit.
The murder which occurred in 2016 saw a confession by one Peter Ngugi, who said he is the one who killed the lawyer and the two people who were with him.
Prosecution claims that Ngugi voluntarily confessed to the murder detailing how and where the executions were committed.
Justice Lessit is therefore set to determine whether the confession can actually be admitted in court.
Mr Ngugi alleged that those who testified against him in the Willie Kimani murder case promised to pay him Ksh.200,000 for his business, Ksh.30,000 monthly and give him a good house.