Det. Marc Hillen
St. Louis County Police Department. Crime Scene Investigator and Instructor. Scene Diagram Specialist. Blood Spatter Instructor. Crime Scene processing and evidence collection. Death Investigator. Photography Specialist.
Marc recently retired from St. Louis County Police Department after 30 years of service. Prior to becoming a Police Officer he served in the United States Marine Corp. After leaving the Marine Corp and while working as a Police Officer he continued his education at Webster University.
Marc spent 10 years in crime scene investigation. During that time he trained in the forensic labs at Kansas University, Iowa State University and Marshall University. He frequently worked on cases with the FBI and United States District Attorney’s Office. He was an invitee of the Blood Spatter Symposium held every two years in Iowa.
His professional associations are SWGSTAIN (scientific work groups for blood stain patterns) and IABPA (international association for blood pattern analyst).
Before leaving the Crime Scene Unit Marc was commended by the Chief of Police for his body of work which included more than 4000 crime scenes and more than 150 homicide investigations.
Several letters were sent on his behalf by Prosecuting Attorneys praising his professionalism and court room testimony which lead to successful prosecutions.
Mary “Terry” Barton
She began her law enforcement career after receiving her Bachelor's Degree in Criminal Justice from Southwest Texas State University. She joined the St. Louis County Police Department in October 1978 and has had held numerous positions including, patrol (officer and supervisor), Bureau of Drug Enforcement Detective, Bureau of Special Investigations Detective, Bureau of Communications Supervisor, Patrol Lieutenant, and Bureau Commanders in Staff Services and Security Services. Captain Barton also instructed classes at the County and Municipal Police Academy in Interpersonal Communications, Cultural Diversity, and Workplace Survival. In addition, she has instructed fellow employees in interview skills, promotion preparation, report writing, and task force development/management.
Captain Barton has received numerous awards, commendations, and letters of appreciation throughout her career. In 1983 she was nominated and included in the Outstanding Young Women in America. In 2005, she was selected by the National Register's Who's Who in Executives and Professionals. She earned a Master’s Degree in Management and Human Resource Training and Development from Webster University in 1991 and is a graduate of the FBI National Academy, Class 237.
Captain Barton has served over twenty three years in the Greater St. Louis Area Major Case Squad as an investigator, supervisor, Deputy Commander, and Chief Report Officer. She is a member of the International Homicide Investigator's Association. She has been a member of the Public Safety Advisory Board to the Special School District for over 25 years, developing and advising on training curriculum for vocational high schools students planning to pursue law enforcement careers
Peter Sansone
Peter Sansone is a 22 year veteran of Public Safety, serving as an auxiliary firefighter, EMT, and the past 17 years, as a police officer for the St. Charles City Police Department. His current department assignments include Crime Scene/Forensic Identification Officer and Accident Reconstruction Team Officer. Sansone is an adjunct instructor at the St. Charles Eastern Missouri Police Academy. Past department assignments include: Patrol Operations, Bicycled Unit, Business Liaison Officer, Field training Officer, and St. Charles County Regional Drug Task Force Narcotics Detective.
Sansone graduated from Columbia College with a Bachelor of Science degree. He earned certifications in Crime Scene/Forensic Identification from the St. Louis County and Municipal Police Academy and Northwestern University’s Center for Public Safety. These certifications are in the area of crime scene investigation, crime scene reconstruction and analysis, medico legal death investigations, and homicide investigation. He obtained certifications from the Missouri State Highway Patrol in accident reconstruction, basic and advanced crash investigation, crash reconstruction, commercial motor vehicle reconstruction and motorcycle/pedestrian crash investigation. Sansone is a current member of the Illinois Association of Technical Accident Investigators.
Det. Clay Peeler
Detectve Peeler retired after 35 years in law enforcement, to include state and local agencies; 24 with St. Louis County Police Department. His positions included supervisory levels, tactical units, fugitive and warrants, field training instructor since 1987 (patrol and crime scene) and crime scene investigation for 20 years. He earned a Bachelor of Science from Southeast Missouri University. He is a board certified Senior Crime Scene Analyst with highly specialized backgrounds in death investigation, blood spatter interpretation, shooting reconstruction, accident reconstruction, arson and explosions, clandestine gravesites, pattern injuries, scene reconstruction, and event sequencing. He is a recognized expert witness in crime scene investigation. He has instructorships in numerous disciplines since 1985, but has specialized in basic and advanced Crime Scene Investigation for 18 years at area training facilities and police academies. In addition to managing investigation scenes for St. Louis County and area police departments, task forces, Greater St. Louis Area Major Case Squad, and officer involved shooting teams; he has worked closely with both St. Louis County and St. Louis City Medical Examiners’ office pathologists for autopsy documentation.
After retiring, he opened CP Crime Scene Consulting and Seminars to provide training in numerous law enforcement areas.