He's got a blog post up on his dunfeewalks site where he very convincingly shows that 2012 Olympic race walking champ Elena Lashmanova competed while in the midst of a 2-yr ban on December 30th. The Russians tried to claim that the photos of Lashmanova were from the race in 2012 but he Dunfee shows you why that's a lie. Many of the shoes didn't exist in 2012, the bib numbers don't match up and people in the podium pictures from the alleged 2012 race are wearing the exact same clothes in 2014.
Great work. Read his blog post here.
Here is an article on how the IAAF is now investigating.