Better news source: http://www.bbc.com/news/blogs-news-from-elsewhere-32496258
He was ultimately acquitted on a technicality: http://icelandreview.com/news/2016/07/06/pink-geyser-project...
Some valid points were raised in the man's defense (e.g. the food coloring dissipated fairly quickly) though I can't say I approve.
On a side note, it seems any mention of the controversy has been scrubbed from his Wikipedia entry: https://en.wikipedia.org/wiki/Marco_Evaristti