No, what I said--and still say--is that in some instances, if not in most, there is no need of a suspect at all. Berthier fell out of a window, and Napoleon II died from consumption. To assume there must be suspects in either of these situations order on the decidedly odd. Almost Roswellian, in fact.
You may certainly continue with Basic Investigation 101. The rest of us will contiinue with appropriate scholarly research.