Santino William Legan

On July 28, 2019, a mass shooting occurred at the Gilroy Garlic Festival in Gilroy, California.

The gunman killed three people and wounded 17 others before killing himself after a shootout with responding police officers.

, investigators had not determined the motives of the gunman, identified as 19-year-old Santino William Legan.

The FBI opened a domestic terrorism investigation into the incident.

The Gilroy Garlic Festival was an annual three-day event held at Christmas Hill Park.

One of the nation's best-known food festivals, centered on garlic, it drew 80,000 to 100,000 visitors from around the country and was described as a family event.

Located about 30 mi southeast of San Jose and the Silicon Valley area, Gilroy is home to about 60,000 people, and the city is a major producer of garlic.

As Gilroy's top fundraising event, the Garlic Festival was staffed with volunteers to raise money for nonprofit groups, including clubs and schools.

The shooting occurred during the 41st annual gathering of the festival on Sunday, July 28, 2019—its third and final day—shortly before the scheduled closing at 6:00p.m. The gunman entered the festival by using bolt cutters to cut through a wire fence along Uvas Creek, thus evading security screening.

Authorities stated that a WASR-10 semi-automatic rifle was used, a Romanian variant of the AK-47.

It was equipped with a 75-round drum magazine.

The gunman was also wearing a bulletproof vest and carrying five extra magazines of 40 rounds each.

The gunman opened fire on festival-goers near an inflatable slide, ultimately shooting 39 rounds.

Eyewitnesses described a white man wearing a green shirt and a grayish handkerchief around his neck firing into the food area.

Witnesses reported that he appeared to be firing at random.

Jack van Breen, the lead singer of the local band Tinman (which was performing an encore when the shooting began) told KPIX-TV that he heard someone shout, "Why are you doing this?"

The gunman's response was, "Because I'm really angry."

Police at the scene engaged him within a minute of the first shots being fired, firing 18 rounds and hitting the gunman several times.

The police chief credited the fast response to a heavy police presence with "many, many officers in the park".

The three officers were placed on administrative leave per standard procedures when they fire their service weapons in the line of duty.

While initial reports indicated that the gunman was killed by the police, the Santa Clara County coroner reported on August 2 that the gunman died from a self-inflicted gunshot wound to the head, after officers had already shot him multiple times.

Along with the Gilroy Police Department, the San Francisco Field Division of the Bureau of Alcohol, Tobacco, Firearms and Explosives and 30 FBI agents also responded to the scene.

Three people—Stephen Romero, age 6; Keyla Salazar, age 13; and Trevor Deon Irby, age 25—were killed, all by single gunshots to the torso.

An additional 17 people were wounded.

The Santa Clara County Healthcare System's two hospitals treated 19 patients, including the gunman.

Some were also treated but not admitted.

The patients ranged in age from 12 to 69; 11 had gunshot injuries and eight had other injuries.

Two victims were also reported hospitalized at Stanford Hospital.

Santino William Legan, a 19-year-old male, was identified by authorities as the shooter.

Police believe he acted alone.

Legan spent most of his life in Gilroy and attended Monte Vista Christian School through his freshman to junior years and graduated from Gilroy High School, but in the months before the shooting lived in the remote town of Walker Lake in Mineral County, Nevada.

He purchased the rifle used in the shooting in Fallon, Nevada, on July 9, three weeks before the festival.

The possession and sale of the weapon are banned in California, but legal in Nevada.

An Instagram account was opened four days before the shooting by a Santino William Legan of the same age, who self-identified as being of Italian and Iranian descent.

On the day of the shooting, Legan made two posts to the account, one of which complained about the event congesting the countryside with "hordes of mestizos and Silicon Valley white twats" and instructed people to read the book Might Is Right, a pseudonymous proto-fascist manifesto.

Authorities discovered a Remington 870 shotgun inside Legan's car.

Police and federal agents searched Legan's father's house in Gilroy.

Investigators also searched the gunman's apartment in Walker Lake, Nevada, where they reportedly discovered a bulletproof vest, empty shotgun and rifle boxes, a gas mask, and empty ammunition boxes, and pamphlets on guns; investigators also confiscated three hard drives and three thumb drives.

Investigators have not determined a motive for the attack.

Brian Levin of the Center for the Study of Hate and Extremism at Cal State San Bernardino stated that research has shown some mass shooters have "a broad range of motivations and, at times, conflicting ideologies, which can make it difficult to classify attacks and pinpoint their motivations."