Police are questioning around 10 people over the death of the late Cabinet Secretary for Interior Joseph Nkaissery.
Among those questioned include waiters who served him at the Bomas of Kenya lounge where he is said to have eaten a light meal before heading home on Friday night.
Detectives are also said to be investigating his house help, a driver and bodyguard who took him to hospital and a security consultant at the Office of the President, Francis Mugambi, who joined them at the hospital.
They also spoke to a number of officials at Karen Hospital including Dr James Mageria, who confirmed to them the CS had passed on by the time he was taken to the facility.
Director of Criminal Investigations Ndegwa Muhoro also revealed on Sunday that bodyguards assigned to the CS were also being questioned by detectives pursuing a line of sudden death.
“According to the Criminal Procedure Code, sudden death must be investigated, even if it was sicknesses or accident,” Mr Muhoro said.
He added that a post-mortem examination scheduled for Monday would help in guiding the probe.
“We are looking into it but the postmortem will determine the direction of the investigations. Not that we suspect anything, but we have to deal with the law. Any person who had contact with him must be questioned. Naturally, that is the course of the investigation,” he remarked.
Detectives from the Homicide Department at the Directorate of Criminal Investigation headquarters and those from Nairobi combed various places that the CS visited on Friday.
“We want to know who he talked to, met and the kind of interaction they had at the restaurant and other places,” said an official privy to the probe.
At the Bomas restaurant, where he is said to have taken a glass of wine and food, which they collected samples of and dusted seats.
A corner where he held a meeting at the venue was also cordoned off.
The car Nkaissery used on Friday was dusted and grounded as part of the probe and detectives collected samples from the food he ate. They also carried away clothes and some of the personal effects from his Karen home.
The CS was, besides President Uhuru Kenyatta and his deputy William Ruto, the most-guarded government officer in Kenya.
Speaking at the late minister’s home in Karen, former military chief Jeremiah Kianga urged investigators to move quickly and let Kenyans know the cause of death.
“They should do so quickly and make public the reason behind the death,” Gen (Rtd) Kianga urged.
