Instructors:Gary GraffIris Dalley GraffJackie Smithson

Gary W. Graff retired from the Federal Bureau of Investigation (FBI) after 23 years of service. His broad investigative experience included public corruption, fraud, sex crime, property crime, and violent crime and often involved coordination with state and local law enforcement agencies. Mr. Graff specialized in complex cases often involving hundreds of court exhibits and witnesses.  Awards for his casework included the 2008 Special Agent of the Year for the Oklahoma City Division of the FBI.

Mr. Graff received specialized training in numerous investigative disciplines including homicide investigation, crime scene processing, sketching and reconstruction, shooting incident reconstruction, and blood stain pattern analysis. He was a certified police instructor, SWAT member and instructor, firearms instructor, and member of the FBI’s Evidence Response Team (ERT).  He is an IAI Certified Bloodstain Pattern Analyst and an ACFE Certified Fraud Examiner.  After the World Trade Center attack in 2001, he served as a Team Leader of one of the ERT teams sifting through debris at Fresh Kills landfill.

As a Marine Corps officer, Mr. Graff supervised the collection and analysis of signals intelligence, retiring after 21 years of service both active and reserve.  Awards included the Combat Action Ribbon and Navy Commendation Medal.

Mr. Graff has a Bachelor of Science degree in Electrical Engineering from the University of Oklahoma.
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Partnered with Forensic Analyst Iris Dalley Graff, Special Agent, Oklahoma State Bureau of Investigation (Retired), the Graff team provides training, case consultation and qualified expert testimony in general investigative methods, crime scene analysis, shooting incident reconstruction, and blood stain pattern analysis. Their instruction focuses on the needs of the student and the practical skills necessary for success in the field.  They remain dedicated to sharing their 60 plus years of collective experience and helping police investigators and crime scene personnel improve their professional skills.

​A Student's Experience:

“The crime scene reconstruction course by Gary and Iris Graff was an incredible learning experience. The knowledge and experience Gary and Iris brought to the class concerning scene documentation, bloodstain pattern analysis and shooting incident reconstruction was invaluable and their focus on scientific methodology and fact based objective analysis should be a model for all crime scene analysis training”.

  -  Brian Smith, Georgia Bureau of Investigation

Iris Dalley Graff served as a Special Agent for the Oklahoma State Bureau of Investigation (OSBI), retiring in 2009. During her career, she conducted laboratory analysis, crime scene investigation, and worked with various police agencies in processing and investigating hundreds of homicide investigations.  For the past 20 years, she often partnered with Gary Graff, Special Agent FBI (Retired), in conducting investigations and law enforcement training.

In 2016, she partnered with Mr. Graff to form Graff Investigative and Forensic Training, a team with 50 plus years of collective experience dedicated to the professional development of law enforcement. Dalley has a B.S. in Biology and Masters in Secondary Sciences. She has decades of experience in providing case consultation, expert testimony, forensic analysis and instruction in bloodstain pattern analysis, crime scene reconstruction, and shooting incident reconstruction, in the United States and other countries.

​From 2008 to 2016, she was a partner in Bevel Gardner and Associates, a training and consulting group.  Her forensic instruction focuses on the needs of the student and the practical skills necessary for success in the field.  She is a Fellow and Distinguished Member of the Association for Crime Scene Reconstruction and former president of the International Association of Bloodstain Pattern Analysts.

​A Student's Experience:​“Thank you for the opportunity to attend this class!  This was an extremely informative class, and I found it very hard (which is a good thing) because of my lack of experience in major crimes. So this gave me the chance to see what crime scene reconstruction is all about and how you even begin to put things together at more involved scenes. Because of this class, I will now know what to look for when I do work a major crime scene”.

Tina Stidham, Crime Scene Investigator, Boynton Beach Police Department, FL
(Student's name used with permission)

Jackie Smithson is a career law enforcement officer in Oklahoma, having served the last 15 years as a forensic investigator while concurrently teaching as an adjunct professor of criminal justice. He spent the first several years of his career with Broken Arrow assigned to the Uniformed Patrol Division then the Traffic Specialist Unit.  His inquisitive nature lead him to request a transfer to the Crime Scene Unit where he still serves.

He continued his education and earned a Master of Science degree at Northeastern State University, publishing his thesis on collecting bullet trajectories in soil. He later accepted a position at his alma mater as an adjunct professor as well as at the University of Arkansas Fort Smith.  Additionally, Jackie has been asked by several other universities, including Oklahoma State University School of Forensic Science, to guest lecture in the field of forensics and has instructed for the State of Oklahoma Council on Law Enforcement Education and Training basic police academy.  

Due to his extensive training and experience on subjects including the analysis of latent fingerprints, bloodstains pattern analysis, photography, video imagery, serial number restoration, and overall crime scene reconstruction, Jackie has been qualified as an expert witness by the courts, testifying in numerous court cases during his career.  Having managed the crime lab at the Broken Arrow Police Department, which included going through the process of ASCLD/LAB accreditation, Jackie has traveled nationally and Internationally to serve as a technical assessor for ANAB.

He has served on the boards of many professional organizations throughout his career including the Oklahoma Division of the International Association for Identification for 12 years, 4 as president.  Recently, Jackie has focused much attention on the use of drones in the field of forensics and continues to enjoy sharing his experience in all aspects of the field of forensics.