His son , Papa Massata Diack , has also been implicated .
So far , much of the attention has centered on Lamine Diack , a former IOC member and head of the international track federation .
Lamine Diack 's son , Papa Massata Diack , has also been implicated .
So far , much of the attention has centered on Lamine Diack , a former IOC member and head of the international track federation .