Understanding CTE: Challenges, Cases, and Impact on the Brain

Experts say it will take weeks to determine if Shane Tamura, the gunman in a Manhattan shooting, had CTE, a degenerative brain disease, as testing involves detailed post-mortem brain analysis. While Tamura's note suggested he suffered from CTE and held grievances against the NFL, experts caution against directly linking CTE to violent acts, emphasizing that many with CTE do not exhibit violence. The investigation and testing are ongoing, with no immediate conclusions.