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Bar and Restaurant Security: Lessons from Premise Liability Cases

May 10, 2025

When patrons step into a bar or restaurant, they expect a safe and enjoyable environment. Yet, in the world of nightlife and hospitality, incidents of violence, theft, or injury can—and do—occur. These incidents often raise complex legal questions around premise liability, and more specifically, whether the establishment implemented reasonable security measures to prevent foreseeable harm.

As a bar security expert and entertainment safety expert witness, I’ve worked on numerous cases where security negligence in high-traffic hospitality environments has led to litigation. Below are key lessons learned from these cases that every establishment—and attorney handling premise liability matters—should understand.



1. Foreseeability is Everything

The foundation of most premises liability cases is foreseeability. Was there a history of criminal activity at or near the location? Were there past altercations involving patrons? If so, failure to address these risks may indicate negligence.

As an expert, I evaluate local crime data, previous incident reports, and industry standards to determine whether the establishment could reasonably foresee the event. Ignoring these red flags often proves detrimental in court.



2. Security Presence Isn’t Enough

Many bars assume that simply hiring a bouncer or security guard is sufficient. But security effectiveness depends on several factors:


  • Training (especially in de-escalation and crowd control)

  • Clear post orders

  • Positioning and visibility

  • Supervision and accountability


A poorly trained or misused security team can exacerbate issues rather than resolve them. Proper deployment is crucial in high-risk environments.



3. Environmental Design Matters

Through Crime Prevention Through Environmental Design (CPTED) principles, security can often be improved without more staff. Well-lit parking lots, unobstructed sightlines, and controlled entry/exit points can significantly reduce opportunities for crime.

In many of my assessments, poor lighting or lack of surveillance cameras played a role in enabling assaults or thefts. These architectural factors are frequently overlooked—and are easily remedied.



4. Incident Documentation Protects Everyone

One recurring issue in litigation is the absence of proper documentation. Incident logs, witness statements, and video footage often make or break a case. When records are incomplete or inconsistent, defense claims weaken.

From a legal standpoint, well-kept records demonstrate an ongoing commitment to safety, helping to establish due diligence in court.



5. Consistency is Critical

Security procedures must be consistently followed, not just posted. In one case I reviewed, security protocols were excellent—on paper. But interviews and surveillance revealed those procedures were rarely enforced on busy nights.

As an entertainment safety expert witness, I help identify these gaps between policy and practice—gaps that often lead to avoidable harm.



How I Can Help

Whether you're litigating a nightclub assault case or investigating an incident at a restaurant, I offer:


  • Expert analysis of bar and restaurant security protocols

  • On-site assessments of physical and operational vulnerabilities

  • Data-driven testimony backed by crime demographics and foreseeability models

  • Visual demonstratives that help jurors understand complex security failures


I combine decades of field experience with current threat intelligence to help legal teams build strong, fact-based arguments in premise liability and security negligence cases.

CONTACT
SEAN A. AHRENS

Tel: 1 (833) 247-3677

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ean Ahrens, a security consultant and expert witness based in Chicago, Illinois.

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Expert Witness Security Consulting in Chicago

SEAN A. AHRENS, MA, CPP, CSC, BSCP, FSyl, CHPA

Years in Practice: 23

  • General Specialties: Security Management

  • Contact me to see my CV 

Fields in specialization focus: Workplace violence, armed assailant active shooter, operations alarm, surveillance, crime prevention through environmental design, commercial, retail, and hospitality.

Working as a current security consultant, I have current knowledge regarding current threats, and vulnerabilities for a myriad of building types: parking garages, apartment buildings, warehouses, bars, restaurants, entertainment, office, workplace violence and security technology, operations, and architecture. 

My focus is on premise liability, negligence, wrongful hiring, foreseeability, crime demographic analysis, benchmarking, physical security, and security management.

  • My education: I have a master's in organizational security management from Webster University, graduating with honors–Cum Laude. Before that, I did my bachelor's in criminal justice at Western Illinois University. I continue to obtain certifications that further substantiate my security lineage.

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