Update!
http://www.noticias24.com/actualidad/?p=12663
Turns out, Ivan Rios was killed by his own “chief of security”.
My translation;
Jose Juvenal Velandia, alias Ivan Rios, important member of the “secretariat” of the FARC and chief of the “Central Block” of the organization was assassinated by his own chief of security, when they found themselves surrounded by the Colombian army, in the border zone of Antioquia and Caldas.
The chief of security, who gave himself up with other guerrillas, took with him to the security forces, Ivan Rios’ “right hand”, his national ID and his computer.
The miniter of defense just confirmed this and is offering further details.
http://www.eltiempo.com/justicia/2008-03-07/ARTICULO-WEB-NOTA_INTERIOR-3990694.html
El Tiempo also says his real name was Manuel Jesús Muñoz Ortiz, not Jose Juvenal Velandia.