What Is This?

The Scene

It’s 10:45 on a Tuesday morning in downtown Indianapolis. Scott Person, wearing a red jacket emblazoned with the words “Safety Ambassador,” has already given directions to a tourist, helped a food delivery worker find a blocked entrance, and noticed a man sitting against a building who hasn’t eaten in four days. Person, who carries no weapon and has no power to arrest anyone, takes the man to get a meal. Later that afternoon, a stranger taps him on the shoulder. “Just wanted to say thank you for what you do,” the man says. “It makes a difference.”¹

That encounter — the food, the directions, the gratitude — is what safety ambassador programs are built for.

What Safety Ambassadors Are

Safety ambassadors are trained, unarmed public safety professionals deployed on foot, bicycle, or in marked vehicles across commercial districts, downtown corridors, and university campuses. They wear bright, distinctive uniforms (lime green in Gainesville and Austin, yellow caps and green jackets in Arlington, neon yellow and black in San Francisco, red jackets in Indianapolis).²

Their core function draws on what criminologists call the sentinel effect: the deterrent that comes from consistent human presence in public spaces. Carnegie Mellon University professor Dan Nagin has argued that when it comes to crime prevention, the sentinel function — making crime less attractive — matters more than the power of arrest.³

The operational model adds several layers on top of basic presence. Ambassadors in documented programs typically:

Carry naloxone (Narcan) and are trained in CPR to respond to overdoses and medical emergencies

Know de-escalation techniques for minor conflicts and disturbances

Can connect people experiencing homelessness, behavioral health distress, or other service needs to shelters, meal programs, mobile crisis teams, and other local services

Provide assistance with car problems, directions, safety escorts, and other daily needs that residents and visitors would otherwise have nowhere to bring

Report hazards, graffiti, and maintenance needs to city services

Wear body cameras for accountability in most documented programs⁴

What they do not do: make arrests, carry weapons, use physical force to remove or detain anyone. When a situation exceeds what an unarmed civilian can safely handle, ambassadors call police.⁵

The Core Distinction: Presence vs. Response

Three documented programs illustrate how the presence model differs from dispatch-response policing.

In Gainesville, Florida, team leader Reed Johnson made sure his 14 ambassadors visited “two or three businesses a day” to build relationships over time.⁶ In Indianapolis, Scott Person patrols the same area from 7 a.m. to 3 p.m. every weekday, becoming a familiar face to merchants, residents, and the people who use the street.⁷ In Seattle’s University District, ambassador teams achieve five-minute average response times — compared to police response times that average twelve minutes for priority one calls and exceed an hour for lower-priority calls.⁸

One Seattle business owner described the gap directly: “We don’t call the Seattle Police Department because they won’t come.”⁹

A Theory of Change

Four connected claims appear in the documentation of safety ambassador programs. Their evidence levels differ.

Deterrence through presence. John Pfaff, a law professor at Fordham University, has pointed to research suggesting that private security patrols appear to reduce crime — and that the sentinel effect may explain a substantial portion of what people attribute to armed police presence specifically.¹² Studies of the Chicago Public Schools’ Safe Passage program, which deployed community members to monitor routes around schools, found a 17% reduction in total crime on monitored blocks relative to unmonitored blocks.¹³

Response capacity for daily needs. In Seattle’s University District, a Daily UW report documented police response times exceeding an hour for lower-priority calls, and businesses that stopped calling police because responses did not come.⁸

Service connection for vulnerable people. Gainesville’s 14 ambassadors connected more than 100 people experiencing homelessness to services, housing, and medical care in just two months of operation.¹⁴ Denver’s Ballpark neighborhood team made contact with nearly 150 unhoused people in two weeks of March 2025, “helping connect them to services.”¹⁵ Both figures come from program-reported data, not independent evaluation.

Life safety through overdose response. Minneapolis, Gainesville, and University of Georgia ambassadors all carry Narcan and are trained to administer it.¹⁶ These programs report overdose response as part of regular patrol — a life-safety function that police response times often cannot meet in time.

What Safety Ambassadors Are Not

Several program types resemble safety ambassadors in appearance. The distinctions are operational.

Not private security. KUT Austin describes the Austin ambassador team as nonprofit staff with no arrest authority who call police when situations escalate.⁵

Not social workers or outreach workers. Virginia Commonwealth University’s program trains ambassadors in “crisis intervention and mental health first aid” — specifically to recognize a crisis and offer resources.¹⁰

Not a Mobile Crisis Team. Mobile crisis teams deploy licensed mental health clinicians to respond to behavioral health emergencies.¹¹

Not a substitution for police. The Austin program documented an 86% voluntary compliance rate — the share of situations where asking someone to change behavior produces compliance without enforcement.¹⁷

The Range of Programs

Three deployment contexts appear across documented programs.

Downtown and commercial districts. Denver, Indianapolis, St. Louis, Oakland, Arlington, Gainesville, and Cleveland have documented commercial district ambassador programs.¹⁸

University campuses. The University of Georgia, Cornell University, Virginia Commonwealth University, and the University of Washington have documented campus ambassador programs. Virginia Commonwealth University subsequently expanded its program onto Richmond city buses — crossing into transit ambassador territory covered in a separate Safer Cities series.¹⁹

Bottom Line

The twelve cards in this series document what these programs do, where they operate, who supports them, how they are designed, and what is and isn’t known about whether they work. The evidence picture they present is covered in Q05.