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.

Two workers at Chicago's 911 center have been suspended without pay after failing to send police to assist Quintonio LeGrier, who called 911 three times for help on Dec. 26 from his father’s West Side apartment, reports the Washington Post.

Arguing that Quintonio LeGrier, 19, was unarmed when Chicago police shot and killed him over the weekend, his father on Monday filed a wrongful-death lawsuit against the city, reports DNAinfo Chicago.