Chief County Detective: Ronald Zona
Past departments: Pennsylvania State Police
Vice President and immediate past President of FOP Lodge 62

Detective William Brown
Past departments: Irwin Police, Manor Police, Penn Borough Police, Youngwood Police Department
Handles: General investigations

Detective Tony Marcocci
Previous departments: 2 years with Allegheny County Crime Lab; 2 years with the FBI as a fingerprint examiner
Handles: General investigations

Detective John Mandarino
Previous departments: Chief of Monessen Police
Handles: General investigations 

Detective Jenna Derco
Previous Departments: Westmoreland County Park Police
Handles: General investigations; county liaison for school districts

Detective Jason Napier
Previous departments: Lower Burrell Police
Handles: General investigations

Detective Ray Dupilka
Previous departments: Latrobe Police
Handles: General investigations 

Detective Nicholas S. Caesar
Previous Departments: Department of Public Safety, Westmoreland County Park Police, Delmont Police, Irwin Police, Southwest Greensburg Police
Handles: General investigations; detective assigned to the STOP Grant Program (Stop Violence Against Women)/domestic violence cases 

Detective Rick Kranitz
Handles: General investigations

Detective Todd Roach
Previous departments: Allegheny Township Police
Handles: General investigations

Detective John Clark
Previous departments: Arnold Police, Previous Northern Field Supervisor for AG Drug Task Force
Handles: General investigation including violent/drug investigations, instructor at IUP Police Academy

Forensic Detective Kasey Gizler
Past departments: Council Bluffs Police Department Crime Lab
Handles: Crime scene analysis; board member, certified crime scene analyst through International Association for Identification

Forensic Detective Steve Crawford 
Previous departments: Rostraver Police, Clairton Police
Handles: Crime scene analysis

Forensic Detective John Swartz
Previous departments: Pennsylvania State Police
Handles: Firearms investigation and latent prints

Forensic Detective Steven Grabiak
Past Departments: South Greensburg Police, Westmoreland County Park Police, Coroner’s Office
Handles: Crime scene analysis