Lieutenant Ildephonse Hategekimana was born in Mugina commune in the prefecture of Girarama, Rwanda. At the time of the allegations he was camp commandant of the Ngoma military camp in the Butare province.
In collaboration with others holding political and military authority Ildephonse Hategekimana is said to have planned the elimination of the civilian Tutsi population and members of the opposition in order to hold on to power.
Moreover, he is alleged to have personally incited and supervised the massacres and other crimes committed in Butare between April and June 1994 by Interhamwe militias and the military. This was reportedly done by furnishing materiel, in particular hand grenades but also transportation for these troops.
Ildephonse Hategekimana was arrested in Congo Brazzaville on 16 February 2003 and transferred to the ICTR prison quarters in Arusha two days later.