Tracy Harpster
Tracy Harpster is an American author and retired deputy police chief. He is most known for promoting and consulting his theory of being able to recognize whether a 9-1-1 emergency caller is guilty of the crime they are calling to report, after releasing a study on homicide emergency calls in 2009.[1][2][3]
Education[edit]
Harpster graduated from Bowling Green State University in 1983 with a Bachelor of Science in criminal justice. He also attended the FBI Academy in 2004.[4]
Career[edit]
Harpster spent over thirty years at the Moraine, Ohio police department in various positions ranging from patrolman to deputy chief, the final position he retired from after starting his consulting and speaking business. He is a member of the Vidocq Society, a members-only crime-solving club in Philadelphia, Pennsylvania.[5][6][1]
Consulting and speaking[edit]
Harpster provides training in his methodology to "all criminal justice personnel including Dispatchers, Law Enforcement Officers, Detectives, Supervisors, Medical Examiners and Prosecutors" and is an instructor for PHI Investigative Consultants, Inc., a company that provides instruction and consultation in homicide and forensic case investigations in the US and Canada.[5][7][6]
Research and Theory[edit]
In Harpster's original study of 9-1-1 calls, 100 calls were analyzed where half of the callers were not convicted of the crime they called to report and the other half had been convicted. In a later study conducted by Harpster in 2017, the sample size was 200 calls. [8][9]
Harpster theorizes that "An innocent person says different things than a guilty one" during 9-1-1 calls, such as whether the caller asks for help for the victim, provided confusing or rambling information, focuses primarily on getting medical help for the victim, and providing more information than the dispatcher asks for.[8][2]
Based on the result of his research, he presents a "COPS Scale (considering offender probability in statements)" which his clients and their employees can use to assess the caller's involvement in the crime they are reporting.[10] The "COPS Scale" provides a checklist with columns for innocent and guilty based which help the user determine whether the caller may be acting more guilty or innocent based on Harpster's theory.[11]
Writer[edit]
Harpster has authored or contributed to:
- Analyzing 911 Homicide Calls (Practical Aspects of Criminal and Forensic Investigations)[12]
- Practical Homicide Investigation: Tactics, Procedures, and Forensic Techniques, Fifth Edition (Practical Aspects of Criminal and Forensic Investigations) 5th Edition[13]
- Is the Caller the Killer? Analyzing 911 Homicide Calls[14]
References[edit]
- ↑ 1.0 1.1 Murphy, Brett. "They Called 911 for Help. Police and Prosecutors Used a New Junk Science to Decide They Were Liars". ProPublica. Retrieved 2022-12-30.
- ↑ 2.0 2.1 "Are you innocent or guilty? 911 call may tell". Orlando Sentinel. Retrieved 2022-12-30.
- ↑ Harpster, Tracy; Adams, Susan H.; Jarvis, John P. (February 2009). "Analyzing 911 Homicide Calls for Indicators of Guilt or Innocence: An Exploratory Analysis". Homicide Studies. 13 (1): 69–93. doi:10.1177/1088767908328073. ISSN 1088-7679.
- ↑ "Analyzing the voice of a killer". web.archive.org. 2022-12-30. Retrieved 2023-01-13.
- ↑ 5.0 5.1 "Tracy Harpster, M.S, B.S., FBINAA". www.practicalhomicide.com. Retrieved 2022-12-30.
- ↑ 6.0 6.1 "TPD Academy Outside Agency Training Sessions". Toledo Police. Retrieved 2022-12-30.
- ↑ Murphy, Brett. "How Jessica Logan's Call for Help Became Evidence Against Her". ProPublica. Retrieved 2022-12-30.
- ↑ 8.0 8.1 "Nine-One-One Homicide Calls and Statement Analysis: Is the Caller the Killer? | Office of Justice Programs". www.ojp.gov. Retrieved 2023-01-15.
- ↑ www.duodecimlehti.fi https://www.duodecimlehti.fi/duo15977. Retrieved 2023-01-15. Missing or empty
|title=(help) - ↑ "Was it Really a Suicide? | Psychology Today". www.psychologytoday.com. Retrieved 2023-01-15.
- ↑ Harpster, Tracy (June 2008). "911 Homicide Calls and Statement Analysis" (PDF). FBI Law Enforcement Bulletin. 77 (6): 22 – via FBI Law Enforcement Bulletin Archives.
- ↑ Harpster, Tracy (2016). Analyzing 911 homicide calls : practical aspects and applications. Susan H. Adams. Boca Raton, FL. ISBN 978-1-4987-3460-8. OCLC 967638083. Search this book on
- ↑ Geberth, Vernon J. (2015). Practical homicide investigation : tactics, procedures, and forensic techniques (Fifth ed.). Boca Raton. ISBN 978-1-003-09583-5. OCLC 1154017113. Search this book on
- ↑ Harpster, Tracy (2010). Is the Caller the Killer? Analyzing 911 Homicide Calls (1st ed.). Routledge. ISBN 9780429246012. Search this book on
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