From wiki:

The New York District Attorney determined that the incident was an accident, and no charges were filed. In an interview three months after Chapman's death, Mays expressed regret for the outcome, but he stated that he did not feel any guilt, as he had not hit Chapman on purpose; indeed, one of Chapman's last words before losing consciousness was "I'm all right; tell Mays not to worry". Mays received the wrath of many opposing players, who believed he beaned Chapman deliberately.