I haven't seen any reports on how this man was found and by who yet. Are there any?
The closest I have seen is Moses Kuria standing next to the victim's car. At that time the man was either already dead, or on his way in that direction, apparently by strangulation and body blows leaving minimal external bruising. I haven't heard of any reports about the car being dusted for fingerprints, or interviews with Moses Kuria and the watchman in that picture next to the car. There seem to be some pretty obvious early leads that if they are being investigated, it is not being reported.
Whoever killed him appears not to have put much stock in disposing and hiding the body. In fact, they may have wanted the body to be found soon, and especially with the woman. His wife who apparently reported him missing seems like an unlikely suspect. In fact, it's a safe bet she is not involved. The guy was supposed to be found with "his Mpango wa Kando". No reports at the moment suggest that the police are interested in who this person is, let alone why and how she died.
Right about now, we should at least know who found this guy and if they are helping with investigations.