In this 14 October 2009 handout photo provided by the International Criminal Tribunal for Rwanda (ICTR) Idelphonse Nizeyimana, a former Rwandan army captain and senior intelligence officer, sits in the dock in Arusha, Tanzania. Nizeyimana, one of the top suspects in Rwanda's 1994 genocide, pleaded not guilty on Wednesday during his first appearance at a U.N. court in Tanzania