CRIME, POLICE + COURTS

Police investigating role of ‘peacekeepers’ in fatal shooting at Salt Lake protest

Jun 16, 2025, 3:00 PM

As prosecutors consider potential criminal charges against the man whose alleged actions caused the...

Police and medical personnel swarm a person after a reported shooting during the “No Kings” protest and march in Salt Lake City on Saturday, June 14, 2025. (Scott G Winterton, Deseret News)

(Scott G Winterton, Deseret News)

SALT LAKE CITY — As prosecutors consider potential criminal charges against the man whose alleged actions caused the shooting death of another man during Saturday’s “No Kings” protest, the investigation into the so-called “peacekeeper” who actually fired the fatal shot also continues.

Just before 8 p.m. Saturday, as an estimated 10,000 people were marching on State Street, two men who police say were part of a “peacekeeping” group for the rally, spotted Arturo Roberto Gamboa, 24, pull out a rifle and “manipulate” it near 151 S. State.

“Gamboa was then confronted by these two men. Witnesses say Gamboa raised the weapon in a firing position and began running toward the crowd,” Salt Lake City Police Chief Brian Redd said Sunday.

One of the two armed “peacekeepers” fired three rounds. One of those rounds hit Gamboa in the stomach. Another bullet hit and killed Arthur Folasa “Afa” Ah Loo, 39, who police say was an innocent bystander.

Salt Lake police spokesman Brent Weisberg said Monday that investigators do not know where the third bullet ended up. After the shots were fired, “the peacekeepers then attempted to provide medical aid to the victim,” according to a police booking affidavit, while Gamboa allegedly attempted to get away.

Gamboa was found “crouching down among a small crowd of people” in an entryway of a building near 100 South and 200 East, the affidavit states. Others who were seeking shelter following the shots pointed Gamboa out to officers. After being treated for his injuries, Gamboa was booked into the Salt Lake County Jail for investigation of murder.

Police say he was “dressed in all black clothing and a black mask covering his face” before he was arrested, and “was found (to be) in possession of an AR-15 style rifle, a gas mask, black clothing and a backpack,” according to the arrest report. Police say Gamboa did not fire any shots.

“Peacekeepers” questioned by police, then let go

The “peacekeepers” were also taken into custody. Their names and ages have not been released. But after being questioned, neither was arrested. Weisberg said, however, that police are still investigating their actions. Once the investigation is completed, detectives will hand over their findings over to the Salt Lake County District Attorney’s Office, which will decide whether criminal charges are warranted.

While Salt Lake police were still investigating Monday how the men — who were wearing yellow “high visibility” vests — were designated as “peacekeepers,” including whether they were appointed by protest organizers, volunteered, were hired or were self-appointed.

Weisberg says police have confirmed that the men are not current or former police officers. The investigation will also look to determine how many “peacekeepers” in total were at the rally.

Saturday’s protest was organized by the 50501 movement, a grassroots political group known for organizing rallies and protests nationwide.

Sarah Parker, a national coordinator for 50501, told CNN that volunteer peacekeeping teams are common for protests. She said organizers ask attendees, including the peacekeepers, not to bring weapons. Still, Parker said the two men in Salt Lake City stopped what could have been a larger mass casualty event.

“Our safety team did as best as they could in a situation that is extremely sad and extremely scary,” Parker said.

Weisberg said part of the department’s investigation will look into what kind of training the men had before being appointed or before volunteering as “peacekeepers,” as well as any state laws that may apply to carrying weapons.

Likewise, detectives will also continue to investigate a possible motive for Gamboa’s alleged actions and whether he intended to commit a mass shooting. As of Monday, Weisberg said there was no evidence to suggest that anyone else was working with Gamboa.

GoFundMe campaign* was started on behalf of Ah Loo’s family. He had a wife and two young children.

Utah state Rep. Verona Mauga, D-Salt Lake County, said Ah Loo was well-known within the Pacific Islander community for breaking into the fashion world.

“Afa is a Samoan fashion designer, the first Samoan to make it on ‘Project Runway,'” she said. “And that was a big deal, to have someone of Native Hawaiian and Pacific Islander heritage be able to break into the fashion industry, and he’s done amazing work for fabulous people.”

He just recently became an American citizen and voted in his first election last year, Mauga said.

“He was so excited and proud to do that. Afa wanted to be very much a part of what America is and a part of the American dream.”

*KSLNewsRadio does not assure that the money deposited to the account will be applied for the benefit of the persons named as beneficiaries. If you are considering a deposit to the account, you should consult your own advisors and otherwise proceed at your own risk.

We want to hear from you.

Have a story idea or tip? Send it to the KSL NewsRadio team here.

Crime, Police + Courts

A woman in Nephi was arrested after police said she made threatening calls to city workers while im...

Bryanna Willis

Nephi woman arrested after posing as a federal official and threatening city workers, police say

A woman in Nephi was arrested after police said she made threatening calls to city workers while impersonating a federal officer.

4 hours ago

FBI data shows Utahns filed 9,903 cybercrime complaints last year, reporting more than $195 million...

Matt Gephardt, KSL

Scam victims may have a chance to recover stolen money — but they must act fast

FBI data shows Utahns filed 9,903 cybercrime complaints last year, reporting more than $195 million in scam losses.

7 hours ago

Sohail is shown in a hospital after he sustained critical injuries in a stabbing in West Valley Cit...

Pat Reavy, KSL

Valley Fair Mall stabbing incident charged as hate crime

A Taylorsville man accused of stabbing another man multiple times at Valley Fair Mall, allegedly because of his faith, has been charged with two counts of attempted murder.

5 days ago

A vehicle believed to have been involved in a shooting in West Point on May 30. Davis County announ...

Cassidy Wixom, KSL

Second person arrested in connection with West Point homicide investigation

Davis County announced the arrest of a second person involved in a West Point porch shooting in May that led to the death of a veteran.

5 days ago

Andrea Renee Shaw, accused of murdering her twin toddlers, during a hearing at the Payette County C...

Nate Eaton, EastIdahoNews.com

Judge revokes bond for Idaho mom as her attorney argues vaccines, not murder, killed twins

A judge revoked bond Tuesday afternoon for an Idaho mother accused of murdering her twin toddlers despite her claims the children died from routine vaccinations.

6 days ago

The Support Voices of Survivors office is pictured on Tuesday. Domestic violence advocates in Utah ...

Annette Campbell, KSL

Utah domestic violence advocates see summer increase in calls

Advocates for victims of domestic violence said summer often brings an increase in calls for help, with more survivors reaching out for services during school breaks and warmer months.

7 days ago

Sponsored Articles

...

Bear Lake

Road trip ready: How Bear Lake became the go-to destination for Western U.S. travelers

Whether you are chasing pristine beaches, fresh raspberry shakes, or endless water sports, this sponsored guide—brought to you in partnership with Bear Lake —uncovers everything you need to plan the ultimate getaway.   There’s nothing quite like the thrill of hopping in the car with your favorite snacks in tow and heading out for a […]

...

Harper Clinic

A new standard of care: How Harper Clinic’s IOP is changing the face of mental health treatment in Utah

This article is sponsored by Harper Clinic, a Utah-based clinic offering FDA-approved TMS therapy for treatment-resistant depression.    Utah’s mental health crisis is leaving many residents caught in an uncomfortable middle ground: struggling too much for weekly therapy alone, but unable to step away from work, parenting or daily life for inpatient treatment. As demand […]

...

Harper Clinic

Breaking free from depression: How Harper Clinic’s TMS Therapy can help

This article is sponsored by Harper Clinic, a Utah-based clinic offering FDA-approved TMS therapy for treatment-resistant depression.    The weight of depression is real. Many people spend years fighting it, adjusting medications, managing side effects and wondering if this is simply how life is going to feel.   According to the World Health Organization, depression affects […]

mental health...

Andrew Adams, KSL

Library discussions bring men’s mental health to the surface

Therapists say it’s common for men to repress things like trauma, grief, stress and anxiety. Now, a new weekly series of discussions aims to help men bring it all to the surface.

...

Bear Lake Convention & Visitors Bureau

Cozy up in Bear Lake: Discover the magic of a winter getaway

SALT LAKE CITY – The holiday season shines brightest when time slows down and loved ones gather. Gifts, decorations and festive music come and go, but shared experiences tend to last much longer. Research supports that idea. Dr. Theresa E. DiDonato told Psychology Today that vacations can strengthen relationships by creating meaningful time away from daily […]

...

Harper Clinic

Rewriting the path to healing: Inside Harper Clinic’s whole-person mental health model

OREM — A few decades ago, you’d have had a hard time finding a doctor to treat both your mind and body; And a century ago, you’d have been hard-pressed to find a doctor to treat your mind at all. Today, medical professionals are understanding more and more the undeniable connection between the body and […]

Police investigating role of ‘peacekeepers’ in fatal shooting at Salt Lake protest