At least 1 in 4 ex-NFL players who died from 2016 to 2021 had CTE, study finds

At least 25% of ex-NFL players who died between 2016 and 2021 had chronic traumatic encephalopathy, or CTE, a study released Tuesday showed. Dr. Robert C. Cantu, founding member and medical director for the Concussion and CTE Foundation, joins CBS News to discuss.