(CNN) – In Chad, in Central Africa, national park rangers are fighting a war against poachers and they say Sudanese solders are linked to the killings.
In a desolate corner of Chad, piles of stones serve as a solitary marker, the only reminders a morning that still haunts Djimet Seid.
"I was making tea over there," Seid said. "I was right here and they shot me, they shot me here."
More than one year later, it's the first time he's been back. Six of his team, Zakouma National Park Rangers, were murdered as they emerged from their tents for morning prayers.
Juma was saying after he was shot he actually fell down the side of the cliff, they shot at him again, he crawled away and hid in some of the trees, waited for night to fall again and even though he'd been injured he still crawled back up to see what had happened to the rest of his unit and that's when he saw that they had all been killed.
Above the site, park director Rian Labuschagne says it was revenge for a raid his rangers conducted on the poachers' camp just weeks before.
"They are absolute professionals in what they do," Labuschagne said.
The gunmen were highly trained Sudanese poachers.
"The weapons that they are using, is it getting more sophisticated?" Arwa Damon said.
"The last group that we found up at Heban, they had all the communication equipment that they needed," Labuschagne said.
That equipment gave Labuschagne evidence into exactly what his rangers were up against.
Recovered on the scene were satellite phones with images showing hundreds of dead elephants, which matched photos taken of carcasses in Cameroon, linking the poachers to one of the biggest slaughters in decades.
"This is some of the ammunition you collected from the Sudanese poacher's camp," Damon said.
"It's over a thousand rounds that in here," Labuschagne said.
It was traced back to the armories in Khartoum.
"I think it just again shows that there is no control in Darfur," Labuschagne said.
Also recovered at the poachers' camp were Sudanese military uniforms, one identifying as seeming to match those issued to the notorious Abu Tira Paramilitary Service, the other was standard issue infantry. They also found a leave slip from the army.
It's a group of Sudanese coming in well armed with this sort of ammunition, moving in between local villages that's in rainy season completely isolated," Labuschagne said. "It's very disturbing for local security that armed groups like this can move around freely in the region."
"Today all around us there are more weapons and there are more men who can use them. These men have no resources," Idriss Deby, President of Chad said. "Their only resource today that can help them to survive is illegal."
In 2003, the park's population was at 4,000. Today it's down to just 450 elephants.
Armed groups are showing more sophistication, from tactics to technology, either serving criminal networks or poaching to fund their wars back home.
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