I dont know about this but Kenya army has often exhibited gross indiscipline and corruption.
During the 1982 coup, after some Airforce officers had surrendered and raised their arms, they were summarily executed by the army.
The incompetence they showed at westgate should come as no surprise. In Kenya army, promotions are usually tribally based.
Here is another story about how army senior officers then
proceeded to steal the salaries of incaceretated Air force men.
http://voca82august.blogspot.com/