Obama's step-grandmother, Sarah Onyango Obama, who is alleged to have said this, is still alive. She was injured in an auto-accident in February. She reportedly does not speak much English.
It was Obama's American grandmother who died before the 2008 election and her death was not mysterious since she was 86.
More recently, we have copies of zero's mother's (Stanley Dunham) INS documents that show that she was still in Kenya in August of 1961
The INS (which no longer exists) did not deal with US citizens. Stanley Dunham's passport records, released by the State Department, did not include any material before 1965. If additional material has come out recently documenting a 1961 presence in Kenya, I have not heard of it and could not locate it with a google search.
Of course you probably already knew all this.
INS Documents would make reference to her if she were married to a foreigner... I was married to a green-carded foreigner until she became a US citizen, and my name is on all kinds of INS documents for that reason.
AS to her name on INS documents - also - the reference to INS documents might refer to an item called, “Advanced Parole”, which is permission for foreigners here on a visa, non-permanent, married to US citizens, which lets foreigners travel more easily.
Not mysterious? The woman lives 86 years and dies like two days before her grandson is elected president? Color me skeptical.
Too many coinky dinks add up to one big mystery to me.