Back on July 6, officers were called out to a home in the area of Sonora Street and Sherwood Way.
Police say a fight took place outside a quinceanera, and two people were stabbed.
13-year-old Jacob Munoz was rushed to the hospital, where he died.
A second victim recovered.
The 16-year-old suspect was taken into custody on July 8.
He was charged with the murder of Munzo this week.