ruggiero: i saw and witntnessed personalally in the central african republic that the janjawaweed weregoi farar out f their way to accumulate as much ivory and rhino horn as they could to support them, to make moneney. kalronon: everyone''s talking about them, about these horsemen riding through the sahel reaching areas thousanands of k kilometers from their h hoe and coming back with their loot. we have seen clear evidence of that happenining. we've colollected casings linkig specific scenes of poaching in three different countries to sudan. narrator: in addition to cameroon, shell casings were found in the central african republic and chad, all linked to sudanese paramilitary and military groups. and these groups are also killing park rangers. sudan's military is alleged to have murdered six rangers in chad's zakouma national park in 2012. hutson: that murder was accomplished by a joint force of the sudan armed forces and the sudan central reserve police unit known as abu tera. the papark rangers, being good muslims, went out to pray one morning at sunrise, and this joint t force exe