Expert Witness Testimony

What is your occupation?

Arson Analyst

Where are you employed?

St. Louis Metropolitan Crime Lab

Where is your education background?

Saint Louis University

What kind of training did you receive?

I have been a trained analyst for approximately one year. I have received training on fire science fundamentals, crime scene investigation, as well as classroom lectures, hands-on training, and lab training. I have also undergone training to become a Certified Fire Investigator and a Certified Fire and Explosion Investigator.

Is your lab accredited?

Yes

What does that entail?

An accredited lab shows confidence in the accuracy, impartiality, and reliability of the data generated by the lab. My lab has undergone a rigorous assessment by an external authority and has been officially recognized as meeting specific standards and requirements, related to quality management, technical competence, and the ability to produce reliable and valid results.

What is arson investigation?

Arson investigation is the process of determining the cause and origin of a fire that is suspected to be intentionally set. As an arson analyst I specialize in investigating and analyzing fire-related incidents to determine their origin and cause.

Does your lab have specific protocols and procedures in place?

Yes, my lab has established standard operating procedures (SOPs) to ensure consistency, accuracy, and quality in all testing and analysis processes.

Did you follow those procedures?

Yes, to ensure accurate and reliable results.

Did you take notes?

Yes, I took detailed notes throughout the investigation process.

Did you write a report on your findings?

Yes, I documented my findings in a comprehensive report.

Was it reviewed? Why?

Yes, it was reviewed by my superior to validate my methods and conclusions.

How long is the necessary training for an arson investigator?

The necessary training is a two year Certified Fire Investigator program offered by the ATF, which includes six weeks of classroom time and field work examining 100 fire scenes.

What did you use to detect the kerosene?

I used a a Photoionization Detector which is a portable, battery-powered device that detects the presence of volatile organic compounds, including many common accelerants. I then used a gas chromatography equipment at my lab to detect the presence of kerosene in the samples.

Why was the arson debris collected in paint cans?

Arson debris is collected in paint cans, typically new, clean, unlined metal cans, because they are the most effective way to preserve the volatile ignitable liquid residue (accelerant) that may be present. These cans provide an airtight seal, preventing evaporation and contamination of the evidence. 

Were kapak bags used to collect the clothing/evidence? Why?

Yes, kapak bags are used because they are breathable and allow for moisture evaporation, helping to preserve evidence without molding and cross-contamination.