@ m'black
my theory...
theory no 1
3za arives home shortly after wanjiru has gone to bed with intention to kill him...most likely she had conspired with the house guard to call her when wanjiru arrives home...or 3za had been trailing wanjiru from say somewhere like igwamiti township (about 8km from nyahururu town...it is highly unlikely that wanjiru used nakuru-olkalou-nyahururu or nakuru-gilgil-nyahururu routes)...in nyahururu town she waits elsewhere until the guard calls to notify her of wanjiru's arrival...
she moves fast into the house and clobbers the unaware wanjiru who dies instantly...she calls the watchman to help her throw the body from the balcony of the first floor onto the ground floor...once done she leaves and locks the bedroom, coaches the watchman on what to say and leaves the foolish watchman guarding the corpse and the empty house.
theory no 2..
3za arrives in nyahururu a couple of hours before dusk with hired killers...she goes alone to the house and gives the watchman lots of money to go and treat himself including fonicating if capable with clear instructions that he waits until wanjiru and her are at home...and that when wanjiru arrives she be notified by non other than the watchman...when wanjiru arrives the watchman makes the call to 3za who arrives a couple of minutes later..when the watchman is gone 3za goes out to pick the killers whom she gets into wanjirus bedroom and clobbers the poor boy till he is dead...
the killers lift the body and throw it to the ground floor from the first floor balcony...3za calls the watchman later just before she locks the bedroom and the house...when the watchman comes he is coached on what to say without really knowing what was going on...3za leaves the watchman guarding the corpse and the empty house...
theory no 3
3za arrives in nyahururu a couple of hours before dusk with hired killers...she goes alone to the house and gives the watchman lots of money to go and treat himself including fonicating if capable with clear instructions that he comes back before midnight...the watchman happily leaves and 3za goes out and picks the killers...she lets them into wanjiru's bedroom where the waiting begins...
eventually wanjiru arrives and goes straight to bed unaware of the waiting merchants of death...the thugs do their thing throws the body to the ground floor from the first floor balcony...the thugs leave first and 3za waits for the watchman to come back...when the watchman comes back he is coached on what to say and 3za leaves the compound leaving the foolish watchman guarding the corpse and the empty house....
those are my theories and if i were an investigator my investigations would be centred around these theories eliminating them one by one as i collect more and more information and evidence.....
...besides, the presence of a safe alone does not signify that there is money inside...