Placer County

Investigator - District Attorney (#16103)

$48.17-$58.42 Hourly / $8,349.47-$10,126.13 Monthly / $100,193.60-$121,513.60 Yearly


To perform investigative assignments; to assist in the conduct of felony and complex misdemeanor investigations; and to perform “failure- to-provide” investigations.


Receives general supervision from the Supervising District Attorney Investigator and functional supervision from attorneys within the District Attorney's Office.

May exercise technical and functional supervision over technical and clerical staff.


Duties may include, but are not limited to, the following:
  • Conduct difficult and complex criminal and civil investigations and related work with limited supervision; prepare cases for hearings and trials; work closely with attorneys; locate witnesses and suspects; arrest suspects when necessary.
  • Assist local police jurisdictions with criminal and sensitive investigations, as necessary.
  • Interview complainants, suspects, relatives and others involved in assigned investigative cases; obtain statements, documents and related factual evidence.
  • Examine court, police, public and governmental records needed for investigation.
  • Enforce court orders pertaining to custody and visitation agreements.
  • Review information obtained to determine whether to recommend voluntary agreements, or to recommend or advise against issuance of complaints.
  • Interview parties involved in failure-to-provide actions; appear in court.
  • Gather, analyze and preserve evidence concerning crimes.
  • Keep accurate records and prepare reports relating to investigative work.
  • Testify in court as necessary.
  • Work with various cultural and ethnic groups in a tactful and efficient manner.
  • Build and maintain positive working relationships with co-workers, other County employees and the public using principles of good customer service.
  • Perform related duties as assigned.


Duties may include, but are not limited to, the following:

  • Conduct background investigations on Departmental employees.


Experience and Training
Any combination of experience and training that would provide the required knowledge and abilities is qualifying.  A typical way to obtain the required knowledge and abilities would be:

Experience: Five years of full-time paid law enforcement experience, including at least one year of investigative experience.

Training: Equivalent to the completion of the twelfth grade and successful completion of the experience requirement will be accepted as proof of sufficient education for the class.

Required License or Certificate:

  • Possession of a valid and active P.O.S.T. Basic Certificate and ability to obtain P.O.S.T. Intermediate Certificate within one year of date of hire.
  • May need to possess a valid driver’s license as required by the position.  Proof of adequate vehicle insurance and medical clearance may also be required.


Knowledge of:

  • California statutory laws pertaining to criminal and civil investigation, arrest, custody, rules of evidence, search and seizure, interviews and interrogations, hearing and trial procedures, juveniles, mental commitments, failure-to-provide and welfare fraud.
  • Equipment, tools and materials used in criminal and civil investigations.
  • Rules of evidence pertaining to the search and seizure and the preservation of evidence.
  • Organization, roles and responsibilities of a District Attorney's Office.
  • Legal structure and practices of criminal justice, especially the court system.
  • Use and care for small firearms and other law enforcement equipment and tools.
  • Offensive and defensive weapons nomenclature and theory; use and care of firearms, chemical agents, baton and other related law enforcement paraphernalia.
  • Principles and practices of self-defense.
  • Interviewing and interrogation techniques.
  • Crime scene processing, survey, photography and sketching.
  • Preparation of trial diagrams and illustrations.
  • Basic financial record keeping, mathematics and physics.

Ability to:

  • Investigate complex criminal cases while exercising independent judgement; successfully conclude assignments by deadline dates; analyze cases and assist attorneys in preparation of trials.
  • On an intermittent basis, sit while working at desk or attending meetings; walk and stand while conducting field investigations; visual requirements necessary to view evidence and suspects; auditory requirements to listen to recordings of interviews; bend during inspection of crime scene or conducting building searches; perform simple and power grasping, pushing, pulling and fine manipulation; lift moderate weight.
  • On a continuous basis, know the laws, rules and policies impacting criminal investigations; remember case details; understand Departmental policies and procedures; analyze statutes and case law; identify potential suspects; interpret law; observe individuals under surveillance; problem solve individual cases; explain laws and courses of action to involved parties.
  • Referee disputes at citation hearings.
  • Effectively conduct interviews and interrogations; take detailed statements and affidavits.
  • Gather intelligence on "white collar" crimes.
  • Assimilate intricate financial data while reviewing business frauds and embezzlements cases.
  • Think logically and act quickly in emergencies; adopt an effective course of action; judge situations and people accurately; exercise good judgement and make sound, independent decisions while working in the field; work effectively in stressful situations.
  • Understand and interpret laws and regulations.
  • Meet and maintain required peace officer employment standards.
  • Meet and maintain the Departmental firearms qualifications standards.
  • Undertake and satisfactorily complete required and assigned in-service training programs as well as other mandated training requirements.
  • Deal with citizens and public officials under conditions requiring tact and good judgment.
  • Collect evidence at a crime scene; take photographs; prepare diagrams for the case records.
  • Demonstrate keen powers of observation and memory; observe accurately and remember faces, numbers, incidents and places.
  • Communicate effectively both orally and in writing.
  • Work with various cultural and ethnic groups in a tactful and efficient manner.
  • Establish and maintain effective working relationships with those contacted in the course of work.

CLASS: 16103; EST: 9/2/1995; REV: 9/1/2003;