The Defence Headquarters, the Department of state security DSS and the Nigerian Police on Wednesday paraded 15 suspected killers of ex CDS, Air Chief Marshal Alex Badeh.
The Panel of investigators recovered arms in the homes of the high-profile suspects.
20 persons are suspected to be involved in the killing but 15 of them have been arrested.
The Panel of investigators say the killing of the former CDS had no political undertone.
One Aliyu Usman led the killers, the panel said.