For the last three years, this man - Alfonso Cano - led a guerrilla war against Colombia's government.
But on Saturday, the leader of the rebel group FARC was killed in a shootout with security forces.
Colombian officials said Cano - who had a $4 million bounty on his head - died during a raid on a FARC compound deep in the Colombian jungle.
President Juan Manuel Santos called it a major blow for the organization.
(SOUNDBITE) (Spanish) JUAN MANUEL SANTOS, COLOMBIAN PRESIDENT, SAYING:
"I want to send a message to each and every one of the members of this organization: demobilize because, as we've said so many times and as we've proven, you will end up in jail or a coffin."
The FARC was once a powerful force controlling large swaths of Colombia.
But a major offensive by the government has resulted in the deaths of several high-profile leaders in recent years.
And the FARC - which stands for the Revolutionary Armed Forces of Columbia - is at its weakest point in decades.
Cano had led the group since the death of its founder in 2008.
Andrew Raven, Reuters