William Shook, the 12-year-old who died from a gunshot wound during a late June Boy Scouting trip to San Diego committed suicide, police said on Tuesday.

Undated yearbook photo of William Shook. (Courtesy, KSNV News 3)

The 12-year-old Las Vegas Boy Scout who died from a gunshot wound during a late June camping trip to San Diego committed suicide, medical examiner documents show.

William Grey Shook was taking medication for depression at the time of his death, the San Diego medical examiner’s report said.

Officers were called to 1750 Fiesta Island Road just after 7:30 a.m. on June 30, one day after the Las Vegas troop arrived in San Diego.

William and another Boy Scout had just pitched a tent and were inside when the second Scout turned his back to William and heard a gun fire.

Arriving officers found William inside the boys’ tent with a gunshot wound to the head, the medical examiner’s report said. He was pronounced dead at the scene.

The gun police found near Shook’s body was not registered, police said in July, adding that Shook likely brought it with him.

The semiautomatic handgun “reportedly” belonged to the boy’s grandfather, the medical examiner’s report said.

William was the son of former Clark County prosecutor Julie Shook and local defense attorney John Shook, who was a chaperone on the San Diego trip for about 20 members of Boy Scout Troop 50, police said.

The father told police he didn’t know how the gun had gotten to the camp. The other Boy Scouts at the camp said they didn’t know William had a gun and that he never told anyone he had it.

After San Diego police investigated they turned the case over to Metro.

Las Vegas police spokesman Larry Hadfield said Tuesday that Metro is no longer investigating the death and that no one faces charges.

An obituary that referred to him as Will said the boy was an avid reader who loved cats, played the piano and “could beat any video game.” Will attended school at New Horizons Academy.

This is a developing story. Check back for updates.

Contact Ricardo Torres at rtorres@reviewjournal.com and 702-383-0381. Find him on Twitter: @rickytwrites.