A unique, efficient, and directive process 

I have  a unique and dedicated multi-step process. That approach allows us to engage, understand, validate, and evaluate cases programmatically and efficiently.

It all starts with an introductory call to communicate the case specifics and determine if I am the right partner for your firm.


During this call, I can help you identify what information to review, and help identify potential avenues of causation or defense. Once you agree, I can have a proposal sent to you within minutes.

My proposal allows for a wide variety of payment options, so you can engage immediately, especially if this is an urgent case.

I will prepare a robust requests list. I will exhaustively and enthusiastically review all pertinent documentation and autonomously seek my own supportive references.

Once complete we have a call, and you define what you want me to opine on. At this point, I will let you know if the information received/ discovered is supportable.by me.

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I will continually review incoming information and support additional consultation during the discovery phase.


Upon written request, I will author an engaging visual report that articulates the case background and a foundational opinion in defense or support of the cases' causation or foreseeability.  

Here's how my process works...


Have questions?

What does an expert witness do?

Once retained, a premise liability/security expert witness is obligated to truthfully and with integrity review, advise, investigate elements of the case, discover new information and provide direction. When requested to do so, the expert, based on the information received, will author their opinion in a report or verbally in a deposition or trial.

What qualities do I need in an expert witness?

A security expert should love what they do, have attention to detail, excellent written and oral communications skills. Presentations and article or book contributions or authorship will typically evidence this. They should have recent or current experience in the area they are being retained.

When should I hire an expert witness?

Ideally, as soon as possible. The longer you wait, the more chance that environmental conditions will change at the site where the loss occurred. Complicated negligence, premise liability cases should necessitate the immediate engagement of an expert witness. The purpose is to assist with validating information and or help obtain new information. Alternatively, a subject matter security expert should be engaged if opposing council discloses they have retained an opposing security expert.

Where do you practice your security expert witness work?

I work all over the United States, but am based in Chicago, Illinois.

My expert wants to conduct a site visit. Do expert witnesses really need to do a site visit?

The opposing counsel will always ask "have you visited the site", and "how can you render an opinion for something you have never seen". So, the answer is ideally, as soon as possible. The longer you wait, the more chance that environmental conditions will change at the site where the loss occurred. The International Association of Professional Security Consultants (IAPSC) has a guideline that addresses forensic methodologies. Get it here

Security concerns, litigation services, and witness consulting can prove to be daunting. Ahrens security is here to support your expert witness litigation needs – contact me here or checkout my FAQ page!