Attorney General Andrew Bailey announced legal action to remove Kim Gardner from office after she didn't respond to his demand that she resign by noon Thursday.
Many have called the case emblematic of the dysfunction in Gardner's office in St. Louis and some state and local leaders have also called for her resignation.
A 16-year-old boy was taken into custody in connection with the April 2022 shooting that left 14-year-old Maryon Jackson dead and injured another teenager.