to charge a white officer in the death of a mentally ill black man. the federal government is looking into this case as well as others. our george howell has the latest on this very latest controversial case. >> donte was my youngest son. he should have been burying me. >> reporter: surrounded by friends and family, maria hamilton is speaking out for the first time since learning the former police officer who shot and killed her son will not face criminal charges. for this mother, when you heard the decision of this prosecutor, what did you think? >> i wasn't surprised. we're prepared for the worst. >> anytime i have to tell the family that i can't bring justice to them when one of their loved ones has died is always tragic. >> reporter: district attorney john chism says officer