Gilbert was shot and killed at about 6:30 p.m. Aug. 29 at an apartment complex in the 800 block of Front Street, police said.
The boy died of multiple gunshot wounds, according to the Butler County Coroner’s Office. His death has been ruled a homicide.
The second victim — Datorion Marcus Burns, 19, of Hamilton — suffered multiple gunshot wounds, according to Hamilton police. Burns was take to an area hospital for treatment and was expected to survive.
As a juvenile, Hubbard had contact with the court system, including a stay at the Butler County Detention Center, according to court records.
In August 2014, Hubbard was placed on probation, ordered to complete 12 hours of community service and stay away from Walgreens for a conviction of complicity to theft.
Teen dead after double shooting in Hamilton
In August 2015, Hubbard was convicted of assault on a police officer, inciting violence and obstructing official business. He served 41 days in the juvenile detention center and was then placed in the juvenile rehabilitation center for five months. In addition, he was given a fine, ordered to write a letter of apology and placed on intensive probation.
The case has been assigned to Butler County Common Pleas Judge Noah Powers II, but an arraignment date has not yet been set.
MORE: ‘A little boy has been shot … Please hurry’: 10 calls to 911 after Hamilton shooting