Aaron Harnish

Aaron A. Harnish has been employed by the Lancaster City Bureau of Police (PA) for the last 20 years. He is assigned to the Criminal Investigative Division where he investigates all varieties of crimes. He has also been the lead investigator for five criminal homicides, all of which resulted in convictions at trial or guilty pleas. His previous assignments include community police bicycle officer, SWAT operator, and crisis negotiator.

Since 2013, Detective Harnish has performed or consulted on hundreds of background investigations. He currently serves as a full-time background investigator for the Lancaster City Bureau of Police. He coordinates the department's background trainings, and guides junior background investigators.

Det. Harnish holds a Master's Degree in Public Administration and a Bachelor's Degree in Criminal Justice. An adjunct professor of Criminal Justice at several colleges, Det. Harnish enjoys bringing real-life experiences to the classroom. He has conducted numerous training sessions and presentations at professional and academic conferences across the United States, covering a broad range of criminal justice-related topics.