Craig GravelR. Craig Gravel is an instructor at the University of Central Oklahoma Forensic Science Institute, a certified Bloodstain Pattern Analyst, and a retired Oklahoma City Police Lieutenant. He served on the force for 25 years, working in the larceny, mising person, robbery, and homicide units, and serving as a crime scene unit supervisor. He holds a master's degree in criminal justice administration from Oklahoma City University. Read More Read Less