HILLSBOROUGH COUNTY, Fla. (CBS12) — A 16-year-old was arrested Tuesday after investigators say his gun went off inside a fitting room at a Florida sporting goods store, killing a 15-year-old boy.

Deputies with the Hillsborough County Sheriff’s Office say 16-year-old Ahmad Webbis was booked for counts of manslaughter with a weapon in the death of 15-year-old Jaden Law.

The shooting happened July 10 inside Dick’s House of Sport at the Brandon Exchange. Deputies were called to the store around 4:28 p.m. after an employee reported hearing a gunshot.

Deputies arrived within four minutes and found Law dead inside a fitting room.

The Medical Examiner’s Office determined Law died from a single gunshot wound and classified his death as a homicide.

Investigators say Webb and Law were among three juveniles who entered the store together and went into a fitting room.

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Surveillance video showed Webb leaving the fitting room area shortly after employees reported hearing the gunshot, according to the sheriff’s office.

The following day, HCSO’s Dive Team recovered a firearm from a retention pond south of the Brandon Exchange.

Laboratory and ballistic testing later determined the firearm was used in the shooting, investigators said.

The State Attorney’s Office approved the manslaughter charge on Sept. 14 following what the sheriff’s office described as an extensive investigation.

“This investigation has never stopped,” Sheriff Chad Chronister said. “Our detectives have worked diligently to uncover the facts surrounding Jaden Law’s death, and today, we are holding a 16-year-old accountable with a manslaughter charge.”

Chronister thanked investigators for their work, saying they remained committed to bringing justice to Law.

When deputies first responded to the shooting in July, two people believed to be involved were detained within minutes, according to HCSO.

At least 33 deputies, including members of the agency’s K-9 Unit, responded to the scene.

The investigation remains ongoing, and HCSO said additional updates will be provided as they become available.