"(Omalu) must know that this pathology existed for many decades before," said Stewart, the Scottish researcher. "Otherwise he wouldn't know what to be looking for."
'Concussion' movie subject exaggerated role, researchers say →
He also said AEA isn't talking so much about its real issues with the GOP leadership - disputes about teacher pay, school funding, and the private-school scholarship program Marsh set up.
Common Core key issue in Alabama's GOP primary →