Revised: 04/82
FLSA: Non-Exempt
EEO: 4



Under direction, to perform skilled criminal investigative activities; to interrogate/question suspects, witnesses to gather information; to perform undercover operations; to complete reports; to testify in court; and to do other work as required.


The Sheriff's Department provides police protection and law enforcement services to the residents of Clackamas County by enforcing the laws of the State of Oregon. The department is organized into seven major divisions: Uniform Division; Corrections Division; Civil Division; Detective Division; Service Division; Records Division; and Animal Control Division. The Detective Division is responsible for the investigation and follow-up of all criminal cases, and identifying and preserving crime scene evidence. This division works closely with the District Attorney's office in supplying information and case preparation on criminal matters.

Detective is a specialized classification responsible for performing complex and difficult criminal investigative work. Activities involve the application of special knowledge and techniques in the processing, follow-up and investigation of alleged crimes. Specific work assignments may involve undercover operations, operating technical investigative equipment and interpreting complex data and developing logical conclusions. Incumbents are expected to perform interrogations, investigations, report preparation, testifying in court and other operations in a relatively independent manner with limited supervision received from superiors as required.

This classification is distinguished from Deputy Sheriff by the investigative nature of normal work assignments. Detective also differs from the classification of Sergeant which acts as a supervisor or leadworker for a team of law enforcement professionals.


Duties may include but are not limited to the following:

  1. Receives and reviews reports of possible criminal activities and acts including alleged fraud, extortion, theft, robbery, homicide and other felonious activities; investigates complaints to determine whether a crime has been committed; secures evidence for arrest and prosecution of suspect; advises concerning the sufficiency of evidence for holding suspects.
  2. Interviews suspects, victims, complainants, witnesses and informants; follows and traces the movements and activities of suspects; traces and locates missing persons or those charged with the commission of a crime; detects, gathers and preserves evidence from various sources; makes arrests.
  3. Assists prosecuting officers or attorneys in the preparation of cases and in the presentation of evidence; keeps records and makes reports of investigations.
  4. Conducts investigations to control, detect and eliminate vice; gathers evidence and makes arrests in cases of vice operation.
  5. Serves warrants of arrest, prepares affidavits and search warrants, executes search warrants, prepares court returns, and testifies before grand juries and criminal courts.


Working knowledge of: Criminal investigation techniques and practices; laws of evidence, arrest for probable cause and similar laws and statutes; principles of criminal investigation, techniques of interrogation and identification and preservation of physical evidence; methods and use of scientific investigative equipment; use of witnesses; criminal report preparation; criminal justice system and related judicial procedures applicable to criminal law.

Skill to: Review information related to a criminal incident, identify the key elements and develop a case for prosecution; testify clearly, thoroughly and credibly in a criminal court; plan and organize work independently, express ideas effectively orally and in writing; analyze situations quickly and objectively and determine the proper course of action to be taken; obtain information through interview and interrogation; effectively use firearms; prepare clear, concise and accurate law enforcement reports; establish and maintain effective working relationships.


Duties are performed in a wide variety of settings both indoors and outdoors, and frequently in hostile and threatening environments.


Possession of a Basic Police Officer's certification.

Must successfully pass an extensive background investigation including national fingerprint records check.

Must pass a pre-employment drug test.

Driving is required for County business on a regular basis or to accomplish work. Incumbents must possess a valid driver's license, and possess and maintain an acceptable driving record throughout the course of employment.


Any satisfactory combination of experience and training that demonstrates possession of the required knowledge and skills.