Conversation so far:
What happened with Oscar Pistorius in 2012?
At the 2012 Summer Olympics on 4 August 2012, Oscar Pistorius became the first amputee runner to compete at an Olympic Games.
Did Oscar Pistorius win any of the events at the 2012 Summer Olympics?
South Africa was passed into the final on appeal to the IAAF. The South African relay team eventually finished eighth out of the field of nine in the final.
Who defeated Oscar Pistorius in the final?
The men's 4x400 metres relay competition at the 2012 Summer Olympics in London was won by the Bahamas.

Question: What happened with the controversy?
Self-contained rewrite: What happened with the controversy with the 4x400 metres relay competition at the 2012 Summer Olympics?