CHICAGO — The US Department of Justice is investigating the fatal police shooting of a black woman at her Illinois home in July.

Former Sangamon County Deputy Sean Grayson shot and killed 36-year-old Sonya Massey, bodycam video programinside his Springfield home in July after Massey called 911 to report a possible intruder.

SEE ALSO | New video shows Sonya Massey with police hours before she was fatally shot at her home outside Springfield, IL

Grayson was indicted by a grand jury on three counts of first-degree murder and one count each of aggravated assault with a firearm and professional misconduct in connection with the July 6 shooting.

An Illinois State Police review found that Grayson was not justified in his use of deadly force. He was fired from his position at the Sangamon County Sheriff’s Office on July 17, the same day the charges were filed against him.

Paula Crouch, who became Sangamon County’s first female sheriff in Septemberissued a statement on Friday saying, “The Sangamon County Sheriff’s Office takes seriously its responsibility to maintain the highest standards of service and transparency. The Sheriff’s Office, along with involved county agencies, has engaged in discussions and pledged full cooperation with the Department of Justice in its review. While the volume of the material requested is significant, we understand and respect the need for thorough analysis, and we will bring in professional staff to help compile the data to ensure accuracy and completeness We believe transparency promotes trust, which is why much of the material requested specifically regarding the Sonya Massey tragedy is already available for the public to access and review their conclusions and recommendations.This process is an important step in building trust for the entire community and strengthen our delivery of equitable and efficient services to the residents of Sangamon County.

Sangamon County Chairman Andy Van Meter also issued a statement saying: “We welcome the Department of Justice’s review as an opportunity to ensure that our community’s law enforcement services meet the highest standards of fairness and accountability. I have every confidence in Sheriff Paula Crouch and her team to approach this process with openness and diligence. The Sangamon County Board is fully committed to supporting the Sheriff’s Office in meeting DOJ deadlines and requirements, whether through financial resources or additional personnel, we will ensure they have the tools necessary to provide the requested information in a thorough and efficient manner.

READ MORE | Sonya Massey, mother called 911 several times in the days before death for mental health crises

The video in the player above is from a previous report.