BOGOTA, Colombia -- The Colombian rebel who became notorious for killing his sleeping commander, severing the man's hand and delivering it to authorities may have reason to regret it.

Three years later, Pedro Pablo Montoya, is looking at more time in prison.

The killer of guerrilla chief Ivan Rios has been sentenced to 40 years for his role in a 1999 attack on the northwestern town of Narino in which nine police and seven civilians were killed. The chief prosecutor's office announced the verdict Wednesday.

He was convicted with four other rebels of terrorism, murder, rebellion and kidnapping, it said on its website.