I have 20 years of experience, and specialize in the field of accident reconstruction and animations with specific knowledge in the areas of motor vehicle crash reconstruction, forensic animations and event data recorders. I have published on such topics as school bus acceleration rates. I have testified 75 times on topics such as accident reconstruction, forensic animations and event recorders. I completed courses at Northwestern University as an Accident Reconstructionist II 1995 and received my certification from the State of Illinois as a Reconstruction Specialist in 1996. In 1999, I received national certification with The Accreditation Commission for Traffic Accident Reconstruction. In 2003, I received my Instructor Certification in Standardized Field Sobriety Testing from the State of Illinois. In 2007, I received Certification in Crash Data Retrieval Technician and Data Analyst (Black Box) from The Collision Safety Institute.