Colombian warlord Carlos Castano, whose disappearance has rocked peace talks between the government and far-right paramilitaries, has been strangled to death by former comrades, one of Castano's friends said on Friday.
The outlaw Castano, who was political chief of the United Self-Defense Forces of Colombia (AUC), went missing after a shootout with gunmen commanded by rival AUC chiefs at his hidden ranch in northern Colombia on April 16.
"They caught Commander Carlos alive that very day and they killed him two days later, after they kept him for two days with his hands and legs bound, in his underwear," his friend said, saying he had spoken to witnesses.
Military intelligence and state prosecution service officials who have spoken to the friend and colleague of Castano said they believed his report but still had no definitive evidence.
Colombian President Alvaro Uribe was cautious.
"What can I say about a Reuters news report? One has to respect all of them ... The government, faced with this, must be respectful. But I cannot comment," he told reporters.
Proof that Castano was killed could be a fatal blow to year-old negotiations the government hoped would lead to the disarmament of 20,000 paramilitary gunmen waging an illegal war against Marxist rebels and trafficking in cocaine.
Government officials fear the loss of Castano would fracture the AUC and make talks impossible.
Castano aides said rival AUC members heavily involved in cocaine trafficking had attacked him because he was planning to give information about their activities to US authorities.
But other senior commanders from the group said Castano's guards had mistakenly opened fire on their own comrades and he ran away in the confusion.
If he is dead, it was a violent end to a violent life for a man who personally admitted to dozens of killings and forged links between his militia and Colombia's armed forces in a bloody war of revenge against Marxist rebels.
The negotiations, central to Uribe's hopes of pacifying a country locked in a 40-year guerrilla war, had already run into trouble due to the paramilitaries' refusal to serve jail sentences or be extradited for their crimes.
Castano's friend, as well as intelligence and prosecution officials, blamed his killing on AUC political commander Salvatore Mancuso and another AUC chief, Diego Murillo, also known as "Don Berna."
US officials say Murillo is one of Colombia's biggest cocaine traffickers, and also accuse Mancuso of smuggling.
On Thursday, Mancuso denied he was a drug trafficker on local TV. He said he did not know where Castano was and wanted peace talks to continue.
Castano's friend said Don Berna sent the warlord's own brother, Vicente, and a paramilitary known as "18" to kill him.
"That damned 18 strangled him with his own hands," he said.
Castano's aides said that he was hoping to bargain reduced jail time with the US -- which wanted him for cocaine smuggling -- in return for information.



