Police said the officer was discovered lying dead on his bed while facing upwards inside his rental house.
The body was moved to the mortuary pending autopsy to establish the cause of death, police said.
Police said they are not aware of any medical challenges of Musembi.
Meanwhile, a 75-year-old man collapsed and died moments after buying and taking medicine at a chemist in Nakuru Town.
Street children found the lifeless body of Davis Kaguru Njuguna outside the chemist and carried him there.
The pharmacist on duty called the police after he discovered the man had died.
And upon a search, some tablets were recovered from his trouser pockets.
