Here's some from AI's report on Columbia

In Colombia as a whole, grave violations of human rights and breaches of international humanitarian law by all parties to the long-running internal armed conflict – the armed forces, armybacked paramilitaries and armed opposition groups – remained widespread. In 2003, more than 3,000 civilians were killed for political motives and at least 600 "disappeared". Around 2,200 people were kidnapped, more than half by armed opposition groups and army-backed paramilitaries. The civilian population continued to bear the brunt of the armed conflict. The government and security forces stepped up their campaign to undermine the legitimacy of human rights defenders, peace activists and trade unionists.

And who could be funding the government in their campaigns?

International Criminal Court On 6 October, the US government released US$5 million in military aid to Colombia after the Colombian government entered into an impunity agreement not to surrender US nationals accused of genocide, crimes against humanity or war crimes to the International Criminal Court. Such agreements are in breach of states' obligations under international law. Military aid In the fiscal year 2003 the USA sent an estimated US$605 million in military and police assistance to Colombia. Most of the aid was earmarked for "counter-terrorism" and "international narcotics control" purposes. The requirement that the US State Department certify progress on human rights was retained. However, this applied to only 25 per cent of US assistance, down from 100 per cent in 2002.