By Chris Kraul, Los Angeles Times: Using a tree branch, the weathered farmer probed the edge of a pond that his cattle use for drinking water and soon turned up the smelly black sludge that he says has killed much of his livestock and sickened his family. The contamination at Garrido's farm and hundreds of others in a Rhode Island-sized area here in the Ecuadorean Amazon is the basis of a controversial, long-running civil lawsuit in which a verdict is expected early next year. For full story, click here…