The part about his parents' marriage being bigamous never seemed to register on the national press.
“Subject got his USC wife ‘Hapai’ [Hawaiian for pregnant] and although they were married they do not live together and Miss Dunham is making arrangements with the Salvation Army to give the baby away,’’ according to a memo describing the conversation with Obama written by Lyle H. Dahling, an administrator in the Honolulu office of what was then called the US Immigration and Naturalization Service.
The final prosecution witness was Barack H. Obama. According to newspaper accounts of his testimony, Obama said nothing incendiary. He testified only that he and Mboya chatted briefly and he related his own comments about Mboya's parking job. Mboya, he added, "did not say anything to me to indicate that he was frightened." These were hardly the kind of words that would mark a man. But in the politically inflammatory moment, just taking the stand in Njenga's trial was a highly precarious thing to do. Since his provocative remarks about Sessional Paper No. 10 and his liquor-laced public rants, Obama was already known as a critic. Testifying in Njenga's trial was to wave a scarlet flag of defiance in Kenyatta's face. ...
Obama could easily have chosen not to testify. He could have remained silent and hoped that he would drift under the radar and his career would survive. But staying quiet had never been one of his strong suits. "I told him this was like suicide. If they killed Mboya, they can kill you," said Peter Aringo, shaking his head. "He said, 'No, I have to speak my mind.' He could not stand that Tom had been killed He knew that he might be killed himself if he testified. he knew that Kenyatta wanted that case to die. But he went ahead and did it."