Ex-Patriots star Aaron Hernandez had CTE, examiners conclude

Researchers at Boston University found Hernandez, whose April death was ruled a suicide, had Stage 3 CTE, with Stage 4 being the most severe.
Read more: https://www.usatoday.com/story/sports/nfl/patriots/2017/09/21/aaron-hernandez-cte-suicide-murder-new-england-patriots/690651001/?source=Snapzu