A previous thread in GQ: Does Coca Cola use paramilitary groups to kill trade unionists in Columbia? - Factual Questions - Straight Dope Message Board
Deval Patrick, the Coke lawyer mentioned in Cecil’s 2005 column, later served as Governor of Massachusetts: Deval Patrick - Wikipedia
Here’s a 2010 article in The Atlantic that may be of interest: The Pause That Represses? Coca-Cola's Controversies - The Atlantic
A quick Google search does not suggest there’ve been any breakthroughs in the Isidro Gil murder case since 2005.