On a Sunday morning, a church can feel like the safest place in the world. Doors are open. People are smiling. Kids are running the hallways. Greeters are focused on hospitality, not threat recognition. That atmosphere is beautiful, but it also creates something attackers historically look for: access, predictability, and low friction.

Deterrence is not about turning a church into a fortress. It is about changing the math in an offender’s mind. When a would-be attacker sees a harder target, they often hesitate, delay, reroute, or abandon the plan. The goal is simple: make your church a difficult choice, not an easy one.

Deterrence is about certainty, not bravado

Most churches talk about response, what we do if something happens. Deterrence asks a different question: what can we do so it never happens here?

In practical terms, deterrence works when an attacker believes they will be noticed early, confronted quickly, and stopped decisively. Not because of fear-mongering, but because of visible structure: trained people, controlled access, and real-time awareness.

This principle shows up clearly in how offenders select targets. They weigh risk, time, and resistance. When they sense capable guardianship, the plan gets harder.

Charleston: when “security” changes the direction of evil

After the 2015 Charleston church shooting at Emanuel AME Church, reporting included an unsettling detail: Dylann Roof had discussed going to a school first, but a friend indicated he believed he could not get into the school because of security, so he “settled” on the church (Associated Press).

That is the deterrence conversation in one sentence. If a school’s security posture created enough friction to redirect the attacker, then the absence of that friction in a church becomes a vulnerability. It does not mean churches should copy a school blueprint. It means churches must be intentional about being harder to access, harder to move through, and harder to attack without early interruption.

Church security is not a guarantee. But deterrence is often about small things that stack up: locked exterior doors after service starts, a visible presence in the parking lot, greeters trained to notice anomalies, and a plan for engaging a suspicious visitor early instead of hoping they “just leave.”

Nashville Covenant: target selection included “security”

In the Metro Nashville Police Department’s final investigative case summary on the Covenant attack, investigators documented that Audrey Hale compared targets and listed “pros and cons,” explicitly “focusing on the physical structure and security of each location” before choosing the Covenant (Metro Nashville Police Department 30). That matters.

You do not have to speculate about whether attackers think about security. This report shows it was part of the decision process. Attackers study entrances, timing, layout, and how quickly resistance could arrive. The moment a church treats security as an afterthought, it becomes a place where an offender expects time and freedom of movement.

Deterrence does not rely on one dramatic measure. It relies on layers that create uncertainty and resistance: “Will I get inside? Will I be challenged? How quickly will they respond? Will I lose control of my timeline?”

That last piece, timeline, is a big one. Many attacks depend on time inside the building. Anything that reduces that time, or signals that time will be reduced, can influence target selection.

What research tells us: visible “guardianship” reduces opportunity

A common misconception is that deterrence requires a perfect system. In reality, deterrence is about altering opportunity.

One useful parallel comes from research on surveillance and target-hardening strategies. A systematic review of CCTV evaluations found that in car parks, camera-based interventions were associated with a statistically significant reduction in crime of about 41 percent in experimental areas compared with controls (Welsh and Farrington 8). The key takeaway is not “cameras fix everything.” The review notes these successes often occurred as part of a broader package, which is exactly how deterrence works in real life: layered measures that increase perceived risk and decrease opportunity.

Church security works the same way. The most effective deterrent posture is rarely one single tool. It is a system that includes people, policies, environment, and repetition.

What “deterrent” looks like in a church without losing hospitality

Being a deterrent does not mean being cold. It means being prepared.

Here are deterrence layers that are simple, realistic, and church-appropriate:

1. Controlled access, without feeling unwelcoming.
Lock exterior doors once service begins and funnel entry through monitored points. Most churches already have natural choke points. Use them intentionally.

2. A visible presence outside.
A trained team member in the parking lot and at main entrances does two things: it improves safety and it signals guardianship. Predators prefer anonymity.

3. Greeters trained in behavior, not bias.
Deterrence starts at the handshake. Greeters should know how to notice incongruent behavior (nervous scanning, inappropriate clothing for weather, fixation on doors, refusal to engage) and how to quietly alert a team member.

4. Early engagement and friendly accountability.
A simple “Hey, can I help you find a seat?” is often a pressure test. Many problems end right there. If the person refuses contact or escalates, you have gained information early.

5. Environmental readiness.
Good lighting, trimmed landscaping, clear signage, and obvious lines of sight reduce concealment and increase the feeling of being observed.

6. Predictable communications.
Radios, clear role assignments, and a Sunday routine that includes “who is watching what” reduces hesitation. Attackers benefit from chaos. Teams benefit from clarity.

The point is not paranoia. The point is prevention.

A church cannot control the existence of evil, but it can control how easy it is for evil to operate on its property.

Charleston highlights a hard truth: when security increases at one target, attackers may look elsewhere (Associated Press). Nashville shows another: attackers can and do evaluate “structure and security” during target selection (Metro Nashville Police Department 30). Research on situational measures like surveillance repeatedly points to a pattern: when risk perception rises and opportunity drops, crime drops too (Welsh and Farrington 8).

So the real question is not, “Could it happen here?” The question is, “If someone came looking for the easiest path, would they see our church as the easy path?”

Make your church a deterrent to evil. Make it a place where problems get noticed early, challenged quickly, and stopped decisively.

Does having a church security team actually deter attacks?
Deterrence is not guaranteed, but evidence from real cases shows offenders consider security and access. Stronger guardianship can redirect or disrupt plans (Associated Press; Metro Nashville Police Department 30).

What is the most effective first step for deterrence?
Controlled access during service hours, paired with trained greeters and a visible presence at main entry points. Simple friction changes decision-making.

Will visible security scare visitors away?
Not when done with professionalism and hospitality. Most guests feel safer when they see organized, calm preparedness rather than chaos or secrecy.

Works Cited (MLA)

Associated Press. “Friend Says Dylann Roof Initially Wanted to Shoot Up School.” Bay News 9 (Spectrum News), 19 June 2015. 

Metro Nashville Police Department. Investigative Case Summary: Murders of Evelyn Dieckhaus, Michael Hill, William Kinney, Katherine Koonce, Hallie Scruggs, and Cynthia Peak (Case Number 2023-0181711). Summary date 31 Mar. 2025. Nashville.gov. 

Welsh, Brandon C., and David P. Farrington. Crime Prevention Effects of Closed Circuit Television: A Systematic Review. 2002. Problem-Oriented Policing Center.