Allegedly, as a member of Network Zero (a communication association of military and political leaders), he helped train the future death squads.

[8] According to a witness, in March 1994, Nsabimana discussed with Colonel Gratien Kabiligi, chief of military operations, ways the RPF could be defeated after the Arusha Peace Agreement came into effect.

[10] The commander of operations in Kigali was then ordered to quickly prepare lists of members of the armed forces living in residential areas.

[12] On 6 April 1994, Nsabimana, along with President Juvénal Habyarimana, was returning from high-level talks in Dar es Salaam when his aircraft, Dassault Falcon 50, was hit by two surface-to-air missiles and crashed just outside the presidential compound in Kigali.

[14] Rwandan President Paul Kagame has expressed the belief that Nsabimana had been conspiring against Habyarimana and that he had followed him to Dar es Salaam to keep him under observation.