In writing an article for Cristóvão Tezza, I followed the link in the "How to Improve Your Article" section for "free images". There were only two photos of only the subject, both of which are licensed for non-commercial use only. As this photo is licensed for non-commercial use, which is as free as I have been able to find, there should be no risk of the license holder complaining against Wikipedia as Wikipedia is a non-profit foundation. However, per Wikipedia's preference for free material, I also went to the author's website to see if there were any photos available free to the press. While there were several photos available, they were all listed with a photographer's name (the presumed license holder), and none were marked as being free for the press.
As for replacing the photo myself, the subject of the article is a Brazilian author, so I am unable to take a replacement photo as I have never been to Brazil and he is unlikely to travel to my part of the United States in the near future. The photo that I was able to find which has been uploaded was taken at a literary roundtable of sorts in which the author participated. A replacement photo would most likely have to be taken at a similarly public event unless someone can contact the author directly. I do not have a Flickr account and am not sure how to contact the original license holder. I am not confident in my ability to write the author in Portuguese, but that may be a long-term solution if the author has access to free photos not currently identified as such on his website. There is an email address on his website. Vojen (talk) 16:53, 3 September 2013 (UTC)