Slain Dutch billionaire Tob Cohen wrote a series of letters to Kenya's top security officials, with the most recent coming on 12th July.

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Mr Cohen,71, was found murdered and body dumped at a septic tank within his Spring Valley home in Nairobi on Saturday, an incident that shocked the country.

In the letter addressing Inspector General of Police Hillary Mutyambai and DPP Noordin Haji, Cohen, who disappeared seven days later, lamented about his rocky marriage.

Through Musyoka and Mogaka advocates, the golf lover accused his wife Sarah Wairimu and police from Westlands Sub County of colluding to have him deported.

“Unless your offices act speedily and accordingly, our client will continue to suffer humiliation, discrimination and persecution because he is not a Kenyan national, which is wrong, distasteful and unfortunate,” said Mr Cohen through Musyoki Mogaka & Co advocates on July 12.

“My client is astonished at the manner in which the law is being applied to his disadvantage since no step has been taken by police officers at Parklands Police Station to prosecute Ms Wairimu despite enough evidence demonstrating her guilt.”

The involvement of police from Gigiri and Parklands against Cohen could partly expain why DCI George Kinoti assigned officers from his office to investigate the matter.

Also, the officers from the two stations were not incorporated in the search and only showed up after the body was retrieved from the tank.

Former Gatundu North MP Patrick Muiruri has said he spoke to Mr Cohen, who was his friend, the night before he disappeared, and that Mr Cohen had expressed fears about his life.

“I spoke to him for 15 minutes and he was concerned about his life. He said that should he be found dead, a close relation should be held responsible,” said Mr Muiruri.

Detectives could charge his wife with murder on Monday. She has been in custody for the last twenty days. They are also pursuing actual killers.

Also in the drama is an estranged husband to an MP from Nakuru County. He's accused of also having illicit relationship with Cohen's wife.