When your Illinois negligent security or premises security case requires expert analysis, you need someone who can evaluate the security evidence, identify the issues that matter, and explain the findings clearly.
SSMC works with plaintiff and defense attorneys on Illinois matters involving incident analysis, evaluation of security conditions, causation assessments, expert report preparation, depositions, and trial testimony. We are familiar with Illinois’ Rule 213(f) process and stand ready to assist in evaluation and provide litigation support.
Chicago Security Expert Witness Services
Chicago and the surrounding metropolitan area present a wide range of security-related risks that frequently become the subject of negligent security and premises liability litigation. Many Illinois cases arise from incidents occurring at:
- Hotels and hospitality venues
- Apartment communities and multifamily housing
- Hospitals and healthcare facilities
- Parking garages and surface parking lots
- Retail stores and shopping centers
- Entertainment districts, bars, restaurants, and event venues
Each property type presents unique operational challenges, security considerations, and risk factors. Evaluating these matters requires an understanding of the property’s use, operating environment, prior incidents, security measures, staffing practices, and the circumstances surrounding the event.
SSMC assists attorneys throughout the Chicago metropolitan area and across Illinois with forensic security analysis, negligent security matters, premises liability claims, security operations assessments, expert reports, depositions, and trial testimony. Our evaluations focus on foreseeability-related evidence, security program adequacy, industry standards, causation, and the reasonableness of security measures under the specific facts of each case.
Request Availability — Illinois Security Expert Witness
SSMC’s President and Chief Security Consultant, William S. Marcisz, JD, CPP, CHPA, serves as a security expert witness and consultant in Illinois matters involving negligent security, premises liability, healthcare security, security operations, workplace violence, security staffing, security policies and procedures, access control, surveillance systems, and use of force.
William S. Marcisz, JD, CPP, CHPA
- Security Expert Witness & Forensic Consultant
- Juris Doctor (JD)
- Certified Protection Professional (CPP)
- Certified Healthcare Protection Administrator (CHPA)
- Former Healthcare System Executive Director of Security
- Litigation Support, Depositions & Trial Testimony
- Approximately 50% Retention by Plaintiff and Defense Counsel
Contact us for a free initial consultation, CV, fee schedule, or professional references by completing the form below or calling or texting (407) 385-9167.
How Attorneys in Illinois Cases Typically Use Expert Witnesses
A security expert may assist at different stages of an Illinois case, including:
- Preliminary case evaluation
- Identification of security-related issues
- Determining aspects of foreseeability
- Review of prior incidents and crime data
- Evaluation of security policies and practices
- Explaining security industry standards
- Assessment of lighting, access control, surveillance, and guard services
- Site inspections
- Expert opinions and disclosures
- Rebuttal analysis
- Deposition preparation and testimony
- Trial support
When should you involve an expert?
Earlier is usually better. Surveillance video, access-control records, incident documentation, and physical conditions can change or disappear. Early involvement gives the expert a better opportunity to evaluate the evidence while it is still available.
Illinois Negligent Security and Third-Party Criminal Conduct Requiring Expert Witnesses
Illinois generally does not impose an affirmative duty to protect another person from third-party criminal conduct. However, recognized relationships may create a duty to protect against an unreasonable risk of physical harm. In premises-related cases, those relationships can include a business and its customers or an innkeeper and its guests.
When determining whether a duty to protect should be imposed, Illinois courts may consider:
- The reasonable foreseeability of the injury
- The likelihood of the injury
- The magnitude of the burden of guarding against it
- The consequences of placing that burden on the property owner or operator
A qualifying relationship does not automatically decide the case. Foreseeability and other duty considerations still matter.
What does that mean in practice?
Prior crime may be relevant, but numbers alone do not tell the whole story. The property, prior incidents, operating environment, known risks, security measures, and circumstances surrounding the event all need context.
How an Illinois Negligent Security Expert Witness Can Help
A negligent security expert helps counsel evaluate what was happening at the property before the incident and whether the security measures were appropriate for the circumstances.
The expert may review:
- Prior crime and incident information when relevant
- Lighting, access control, surveillance, locks, gates, and doors
- Security guard staffing and patrol practices
- Security contracts and post orders
- Policies, training, reporting, and response procedures
- Whether security measures were maintained and followed
- Whether additional reasonable measures may have reduced the risk or severity of harm
- Whether an alleged security deficiency contributed to the incident or injury
The analysis should fit the property.
A Chicago hotel does not operate like a suburban apartment community. A hospital presents different risks than a retail center. A parking garage, university campus, entertainment venue, or warehouse each requires a property-specific review.
In Illinois third-party criminal-conduct matters, the expert analysis may focus on three practical questions:
- Was the criminal conduct reasonably foreseeable under the circumstances?
- Were the security measures reasonable for the property and known risks?
- Did an identified security deficiency contribute to the incident or resulting harm?
The expert does not determine whether a legal duty existed. That is a question for the court.
The expert’s role is to evaluate and explain the security evidence using a clear, supportable methodology.
Need Help Evaluating an Illinois Negligent Security Case?
SSMC assists plaintiff and defense attorneys with security adequacy, foreseeability-related evidence, causation, expert opinions, depositions, and trial testimony.
Contact SSMC to discuss your Illinois matter, confirm expert availability, and request a CV or fee schedule.
Choosing the Right Expert Witness in Illinois
The right expert should bring more than credentials.
You want someone whose experience fits the property, understands how security programs operate in the real world, and can explain the analysis under questioning.
Match the Expert to the Illinois Property Environment
Security measures should make sense for the actual operation.
The expert should understand:
- How the property functions
- Who uses the property
- How people enter and exit
- What security personnel are expected to do
- Which safeguards were in place
- Whether those safeguards operated as intended
- What practical limitations affected the security program
SSMC evaluates security matters involving hospitals, hotels, apartments, retail properties, educational facilities, workplaces, warehouses, parking facilities, entertainment venues, and other commercial environments.
Red Flags When Hiring an Illinois Security Expert
Be cautious when an expert:
- Guarantees a particular result
- Forms opinions before reviewing the evidence
- Treats all prior crime as equally relevant
- Uses generic security recommendations for every property
- Relies heavily on undefined “best practices”
- Ignores how the property actually operated
- Cannot connect an alleged deficiency to the incident
A credible expert should be comfortable explaining not only what the opinion is, but why the evidence supports it.
Questions to Ask Before Retaining an Illinois Security Expert Witness
A few questions can tell you a lot before the engagement begins:
- What experience do you have with negligent security and premises security matters?
- Have you evaluated a property or operation similar to this one?
- How do you determine which prior incidents or crime data are relevant?
- What records do you need before developing preliminary opinions?
- Is a site inspection likely to be important?
- Are you available for the applicable disclosure, deposition, and trial deadlines?
You should also ask how the expert treats incomplete or disputed evidence.
Clear opinions require a clear distinction between established facts, assumptions, limitations, and unresolved issues.
SSMC’s Expert Witness Focus in Illinois: Security-Related Matters
Our expert witness and consulting work includes:
- Negligent security
- Premises security
- Hospital and healthcare security
- Hotel and hospitality security
- Retail security (stores, malls, shopping centers, and convenience stores)
- Security in bars, restaurants, and nightclubs
- Apartment and multifamily security
- Workplace violence
- Garage and parking-area security
- Access-control and surveillance issues
- Security guard conduct and staffing
- Use-of-force matters
- Educational and campus security
- Security policies, procedures, and training
- Emergency and incident response
SSMC’s President and Chief Security Consultant, William S. Marcisz, JD, CPP, CHPA, combines senior security-management experience with legal training and litigation experience.
William S. Marcisz, JD, CPP, CHPA, is the President and Chief Consultant of Strategic Security Management Consulting, Inc. (SSMC) and serves as a security expert witness and forensic security consultant in matters involving negligent security, premises liability, security operations, workplace violence, use of force, security staffing, policies and procedures, access control, surveillance systems, and healthcare security. He has provided expert consulting, litigation support, deposition testimony, and trial testimony for both plaintiff and defense counsel throughout the United States.
Mr. Marcisz is a nationally recognized author, speaker, and thought leader on security and workplace violence issues. He has published numerous articles in professional journals, delivered presentations for ASIS International, IAHSS, ASHRM, the Florida Bar Association, and other national organizations. Mr. Marcisz has received top-tier industry and peer recognition, including the IAHSS President’s Award, the ASIS Outstanding Security Performance Award for Director of Security, and the ASIS Outstanding Security Performance Award for Security Program.
Why Attorneys Retain William S. Marcisz, JD, CPP, CHPA as a Security Expert Witness
Attorneys retain William S. Marcisz because he brings a rare combination of security leadership experience, professional credentials, legal training, and expert witness experience uncommon in the security consulting field. His background includes extensive experience in security and healthcare environments, including service as a senior healthcare security executive responsible for security operations across multiple hospitals and hundreds of healthcare facilities.
His expert witness practice includes matters involving negligent security, premises security, healthcare and hospital security, hotels and hospitality, multifamily housing, retail establishments, parking facilities, casinos, bars, nightclubs, restaurants, workplace violence, security guard operations, security policies and procedures, emergency response, and security-related standards of care.
Key qualifications include:
- Former senior healthcare security executive for one of the nation’s largest healthcare systems.
- Board Certified Protection Professional (CPP), one of the security profession’s most respected certifications.
- Certified Healthcare Protection Administrator (CHPA) with specialized expertise in healthcare security, safety, and emergency management.
- Juris Doctor with prior experience practicing law in civil litigation, premises liability, personal injury, and negligence matters.
- Experience evaluating security issues involving hospitals, healthcare facilities, hotels, multifamily housing, retail properties, parking facilities, workplaces, and other commercial environments.
- Experience providing expert consulting, deposition testimony, and trial testimony in security-related litigation.
- Retained by both plaintiff and defense counsel, with opinions developed through an evidence-based and objective methodology.
This combination of operational security experience, recognized professional credentials, litigation knowledge, and expert witness practice allows Mr. Marcisz to evaluate complex security issues, identify factually relevant security considerations, and communicate opinions clearly and effectively during discovery, deposition, and trial.
OUR CLIENTS
Security Expert Witness – Illinois Service Area
SSMC provides security expert witness and consulting support throughout Illinois, including: 
- Chicago and Cook County
- Naperville, Wheaton, and DuPage County
- Waukegan and Lake County
- Joliet and Will County
- Aurora, Elgin, and Kane County
- Rockford and Winnebago County
- Springfield and Sangamon County
- Peoria and Peoria County
- Champaign–Urbana and Champaign County
- Bloomington–Normal and McLean County
- Rock Island, Moline, and the Quad Cities
- Belleville, Edwardsville, and the Metro East area
Many engagements can begin remotely with review of pleadings, reports, video, security records, policies, and other case materials.
We can coordinate on-site inspections when the facts require them.
AREAS OF SECURITY EXPERTISE
Hospital Security Expert Witness Illinois
Hospitals present unique security challenges that differ significantly from most commercial properties. Security issues often involve patient and visitor violence, emergency department incidents, behavioral health environments, access control, workplace violence, security staffing, and emergency response. SSMC helps attorneys evaluate hospital security operations, security policies, industry standards, causation, and the reasonableness of security measures in healthcare settings. William S. Marcisz, JD, CPP, CHPA, has spent more than four decades in healthcare security and formerly served as the senior security executive for one of the nation’s largest health systems.
Healthcare Security Expert Witness Illinois
Healthcare facilities face complex security risks involving patients, visitors, staff members, contractors, and members of the public. These matters may involve physician offices, urgent care centers, ambulatory clinics, medical office buildings, behavioral health facilities, and nursing homes. SSMC provides expert analysis regarding healthcare security programs, workplace violence prevention, access control, security staffing, policies and procedures, threat management, and compliance with recognized industry practices.
Security Guard Expert Witness Illinois
Security officer conduct, staffing decisions, supervision, training, post orders, patrol practices, and response actions are frequent issues in security-related litigation. SSMC evaluates whether security personnel were appropriately selected, trained, supervised, and deployed, and whether their actions were consistent with applicable policies, industry standards, and accepted security practices. These assessments may involve proprietary security departments, contract security providers, and specialized security operations.
Use of Force Expert Witness Illinois
Security-related use-of-force incidents often require careful evaluation of the facts, security officer decision-making, available alternatives, policies and procedures, training, and the totality of circumstances confronting personnel at the time of the event. SSMC helps attorneys assess security officer actions, restraint practices, defensive tactics, force options, and whether the force used was consistent with applicable standards, training, and operational requirements. William S. Marcisz has experience evaluating use-of-force matters involving healthcare, commercial, and private security environments.
Workplace Violence Expert Witness Illinois
Workplace violence remains one of the fastest-growing security concerns facing employers and property owners. These matters often involve threat assessment, behavioral warning signs, security protocols, employee reporting processes, emergency response, and violence prevention programs. SSMC evaluates whether organizations implemented reasonable workplace violence prevention measures and whether security, management, and response strategies were appropriate under the circumstances. William S. Marcisz is a nationally recognized speaker, author, and consultant on workplace violence prevention and threat management.
Hotel Security Expert Witness Illinois
Hotels and hospitality properties must balance guest access, customer service, and security. Hotel litigation may include assaults, robberies, parking facility incidents, access-control failures, inadequate security staffing, trespassing concerns, and other premises-security issues. SSMC assists counsel in evaluating hotel security operations, staffing models, surveillance systems, incident history, security policies, and the reasonableness of protective measures based on the property’s operational environment and known risks.
Security Expert Witness in Illinois FAQs
An Illinois security expert witness may qualify through knowledge, skill, experience, training, or education. The expert’s specialized knowledge must also help the judge or jury understand the evidence or determine a disputed fact.
For security matters, relevant qualifications may include experience with security operations, physical security, crime and incident analysis, staffing, policies and procedures, emergency response, and expert testimony.
Illinois Rule of Evidence 702 also applies the Frye general-acceptance requirement when an opinion relies on a new or novel scientific methodology or principle.
Illinois Supreme Court Rule 213(f) treats a retained expert as an “expert witness.”
Upon the required written interrogatory, the party must disclose the expert’s subject matter, conclusions and opinions and their bases, qualifications, and any reports prepared about the case. Rule 213 also limits direct testimony at trial to information properly disclosed through the Rule 213 process or a discovery deposition.
Start with a concise case summary, relevant pleadings, incident documentation, available surveillance video, property photographs, security policies, and important expert deadlines.
The expert can then identify additional materials that may be needed, such as prior incident records, calls for service, access-control data, guard reports, training records, or maintenance information.
No.
Many matters can begin with remote document and evidence review. An inspection may become important when lighting, access points, locks, gates, camera coverage, sightlines, parking configurations, or other physical conditions affect the opinions.
The expert should also determine whether the premises have materially changed since the incident.
Yes.
SSMC accepts appropriate assignments from plaintiff and defense attorneys. The methodology should remain the same regardless of which side retains the expert: review the evidence, understand the operation, identify relevant security issues, and develop supportable opinions.
Talk With a Security Expert Witness Team — Illinois Matters
When you need an expert witness in Illinois, start with the evidence, the security issues, and the case deadlines.
Contact SSMC to:
- Discuss the incident
- Confirm expert availability
- Request a CV
- Obtain a fee schedule
- Request professional references
- Identify the initial scope and records needed
This page provides general information about security expert witness services and does not provide legal advice.