CNN's Kate Bolduan spoke with Terry Totten, the coach who saw Damar Hamlin grow up and take his first steps in American football.
Totten's testimonials were emotionally charged, he spoke of the player's charitable character and his empathy and maturity.
Hamlin went into cardiac arrest Monday during a game between the Buffalo Bills and the Cincinnati Bengals.
The player shows signs of improvement and in the last hours from his bed in intensive care he has been able to communicate with his family by writing.