No charges have been issued and no other information has been released, as of 5 p.m. Friday.
St. Louis police told KMOX Friday morning the case is now in the hands of the Circuit Attorney. The St. Louis Circuit Attorney's spokeswoman, Susan Ryan, sent the following written statement:
"Our job is not to simply charge someone so we can check the box. Our job is to pursue justice by holding the right person accountable with sufficient evidence. A lot of police work needs to be done before charges can be filed with sufficient evidence. Prosecutors have provided police with a list of information that is needed to secure a conviction in a court of law."
Usanga was shot and killed while playing outside of his Hyde Park home Monday, according to St. Louis Metro Police Cheif John Hayden. An 18-year-old man standing nearby was injured in the backyard of the Usangas’ home, in the 3500 block of North 14th Street, just after 5 p.m. Monday evening.
Spokesperson Jack Wang told KMOX a person is in custody, but they did not provide any further information at the time.
Hayden did not release many details Monday about the shooting, including a suspect description or whether the victims knew each other or the shooter. Police said they recovered a pistol from the scene.
Police say the 7-year-old boy has become the 11th St. Louis-area child killed in a shooting since June.
Investigation is ongoing.