Detectives suspect a strong link between Ms Kimani’s macabre killing and the gunshot wound on Mr Irungu’s chest, both hours apart.
Mr Kassaine has also been arrested on suspicion that he could be an accomplice after it emerged that Mr Irungu may have used his gun in an alleged attempted suicide.
Police are also seeking to establish whether a person reported to have been in the company of Mr Irungu near the scene of crime when the murder occurred was Mr Kassaine.
