Aaron Hernandez’s lawyers have filed a federal lawsuit against the NFL and the New England Patriots after tests on the former player brain revealed a “severe case” of brain trauma.

Attorney Jose Baez announced Thursday afternoon that tests performed on Aaron Hernandez’s brain following his suicide determined he suffered from an advanced case of Chronic Traumatic Encephalopathy (CTE).

The lawsuit has been filed on behalf of Hernandez’s daughter.

Baez announced the test results at a press conference in Boston. Shayanna Jenkins-Hernandez, Hernandez’s fiancée, was present during the announcement.

Hernandez was serving a life sentence after being convicted for the 2013 murder of Odin Lloyd.