William Redfairn

Bill came to Dynamic Safety L.L.C., after a 26 year law enforcement career in Nevada and Hawaii. Bill’s last 18 years with the Las Vegas Metropolitan Police Department were devoted entirely to the investigation of vehicle collisions. His last 14 years were with LVMPD’s Accident Investigation section where he was responsible for the investigation of serious injury and fatal traffic collisions. Bill has been recognized as an expert in the fields of accident reconstruction and impaired driving numerous times in Nevada courts. He has extensive experience in teaching law enforcement, judges, lawyers, and the general public in the science of vehicle collision investigation and reconstruction. He has extensive on-scene experience in the identification, collection, and interpretation of physical evidence. Bill has authored lesson plans and articles in the areas of crash investigation and impaired driving.


  • Numerous traffic crash reconstruction classes from Northwestern University, Texas A&M, Collision Safety Institute, Colorado State University, and many others
  • Numerous traffic crash investigation and reconstruction seminars
  • CDR (Crash Data Retrieval) Technician and Data Analyst training
  • Numerous impaired driving detection classes from the National Highway Traffic Safety Administration (NHTSA) and the International Association of Chiefs of Police (IACP)
  • Numerous police agency training classes


  • Certified CDR (Crash Data Retrieval) System Operator – Collision Safety Institute and Crash Data Specialist
  • Basic Certificate – Nevada Police Officer Standards and Training (NV POST)
  • Certified Law Enforcement Instructor, Intermediate Instructor and Master Instructor -Nevada Police Officer Standards and Training (NV POST)
  • Certified Drug Recognition Expert (DRE) – State of Nevada
  • Certified DRE and SFST Instructor – State of Nevada and NHTSA
  • Certified Radar Instructor – State of Nevada
  • CAD Zone Basic and Intermediate Instructor

Professional Organizations :

  • Society of Automotive Engineers (SAE) – 2010 to present
  • National Association of Professional Accident Reconstruction Specialist (NAPARS) – 1998 to present
  • Southwestern Association of Technical Accident Investigators (SATAI) – 1999 to present
  • Nevada Division of the International Association for Identification – 2003 to 2006
  • Accident Reconstruction Network (ARC) – 2006 to present
  • International Network of Crash Reconstruction (INCR) – 2011 to present
  • CDR User’s Group – 2012 to present

Please call us to obtain a complete CV for Mr. Redfairn.