NAIROBI, Kenya, Apr 19 – An autopsy has revealed that renowned author and respected journalist Ken Walibora was stabbed before he was hit by a matatu in Nairobi. He was then rushed by a good samaritan to Kenyatta National Hospital where he is said to have spent 18 hours at the emergency unit, writhing in pain, before he succumbed. An autopsy shows he died of internal bleeding from the stab wound and other injuries as a result of the accident.What was initially thought to be a hit and run acciden