Officer Robert Rialmo

The Cook County State's Attorney's office said Friday that no criminal charges will come against Chicago, Illinois police officer Robert Rialmo, who fatally shot 19-year-old Quintonio LeGrier and mistakenly Bettie Jones, who was a grandmother standing by LeGrier during a fatal incident in 2015.

The Chicago police officer who fatally shot a 19-year-old man and his neighbor in December reportedly keeps offering shifting details about what led him to fire his service weapon, raising doubts about the need for lethal force.