Placer County

Investigator - Supervising District Attorney (#13833)

$55.32-$69.08 Hourly / $9,588.80-$11,973.87 Monthly / $115,065.60-$143,686.40 Yearly


To plan, organize, direct, and supervise the activities of an investigation unit within the District Attorney's Office; to conduct and oversee the more complex or sensitive investigations; and to perform a variety of technical tasks relative to assigned area of responsibility.


The Supervisor level recognizes positions that perform full, first-line supervisory responsibilities including planning, assigning, and evaluating the work of subordinates, and is responsible for a program area within a work unit or department.


Receives general direction from the Chief District Attorney Investigator.

Exercises direct supervision over assigned technical and clerical personnel.


Duties may include, but are not limited to, the following:
  • Recommend and assist in the implementation of unit goals and objectives; establish schedules and methods for investigators; implement policies and procedures.
  • Conduct complex or sensitive investigations independently or as a member of a team; interview and take statements from witnesses and other individuals involved in assigned cases. 
  • Plan, prioritize, assign, supervise and review the work of staff or task force personnel in the assigned program area.
  • Evaluate operations and activities of assigned responsibilities; recommend improvements and modifications; prepare various reports on operations and activities.
  • Prepare cost estimates for budget recommendations; submit justifications for staff, material, and supply needs; monitor and control expenditures.
  • Participate in the selection of staff; provide or coordinate staff training; conduct performance evaluations; recommend discipline; implement discipline procedures as directed.
  • Supervise investigative assignments; oversee work quality and effectiveness; review and evaluate case files and investigation reports for trial readiness; supervise major crime investigations.
  • Evaluate operations and activities as assigned unit an staff, recommend improvements and modifications, and implement as directed; prepare various reports on operations and activities.
  • Coordinate the operations of the public safety-related inter-agency task force or committee on behalf of the County, (areas of assignment may include narcotics enforcement, response to major/violent crimes, financial crimes, high-tech, or related); safeguard and maintain all task force property, equipment, reports, and evidence.
  • Attend all planned enforcement actions to ensure proper supervision; ensure all sworn personnel wear their department-approved/issued uniform and safety equipment during all planned enforcement actions.
  • Consult with the District Attorney and other attorneys concerning evidentiary matters and evaluation of witness testimony.
  • Confer with Local, State, and Federal law enforcement agencies regarding prosecution or investigative matters assigned to the District Attorney's Office; review and evaluate reports submitted by law enforcement agencies for criminal complaints.
  • Act as liaison with other law enforcement agencies.
  • Conduct internal affairs investigations and investigations of citizen complaints as assigned.
  • Work collaboratively with the community to solve problems of crime, disorder, and safety issues and preserve relationships with the public.
  • Answer questions and provide information to the public; investigate complaints and recommend corrective action as necessary to resolve complaints.
  • 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.
  • Respond to emergencies when off duty.
  • Perform related duties as assigned.


Work is typically performed in an indoor office environment with controlled temperature conditions and outdoors in all weather conditions. Duties may be performed in close proximity to individuals who may be dangerous and/or uncooperative, firearms and other weapons, and other environmental conditions related to law enforcement fieldwork.


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: Four years of increasingly responsible experience in criminal investigative work, at least two years of which have been as a District Attorney's Investigator; one year directly related lead or supervisory experience is desired.

Training: Equivalent to an associate’s degree from an accredited college or university with major course work in criminal justice, business or public administration, or a related field.

Required License or Certificate:

  • 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.
  • Possession of an advanced certificate issued by the California Peace Officer Standards and Training Commission (P.O.S.T.). Completion of the California P.O.S.T. Supervisory Course within 12 months after appointment.
Special Qualifications:
Must be 21 years of age by date of appointment.


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 a criminal investigation.
  • Rules of evidence pertaining to the search, seizure, and preservation of evidence.
  • Principles of supervision, training, and performance evaluations.
  • Principles of budget monitoring.
  • Pertinent local, State, and Federal laws, ordinances, and rules.
  • 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 workplace safety.
  • Interview and interrogation techniques.

Ability to:

  • Organize, implement, and direct the work of staff within assigned area of investigations unit.
  • Analyze complex cases; provide investigative assistance to investigators, district attorneys, professional and support staff.
  • On a continuous basis, sit while working at a desk or attending meetings; walk and stand while supervising investigators; twist, squat, stoop or kneel to access files or books; perform simple grasping and fine manipulation; see and hear with sufficient acuity to perform essential job functions.
  • On an intermittent basis wear a utility belt and other law enforcement equipment weighing approximately 30 pounds; lift very heavy weight.
  • On a continuous basis, know all the aspects of the job, including laws, rules and policies impacting criminal investigations; remember case details; understand, interpret and explain District Attorney's Office policies/procedures, statutes, and case law; observe accurately and remember faced, numbers, incidents, and places.  
  • Analyze reports, and cases and special projects; analyze problems related to operational procedures and identify alternative solutions.
  • Supervise, train, and evaluate assigned staff.
  • Exercise good judgment and make sound decisions in the analysis of investigative problems; analyze complex cases; provide assistance to Investigators; employ de-escalation techniques when safe and reasonable.
  • Interpret and explain pertinent County and District Attorney's Office policies and procedures; assimilate changing law and technical advances to train and update Investigators.
  • Assist in the development and monitoring of an assigned program budget.
  • Maintain physical, emotional, and mental condition to satisfactorily perform the functions of the position; meet and maintain required peace officer employment standards to safely and effectively perform assigned duties.
  • Participate in law enforcement training and conferences, stay informed of current police practices and methods.
  • Meet and maintain the District Attorney's Office firearms qualifications standards.
  • Develop and recommend policies and procedures related to assigned operations.
  • Prepare and make presentations related to law enforcement efforts in the community.
  • Collaborate with a broad base of community members and organizations.
  • Communicate clearly and concisely, both orally and in writing.
  • Work with various cultural and ethnic groups in a tactful and efficient manner.
  • Enforce the law tactfully and impartially, interact courteously with the public, subordinates, employee organizations, other County departments and other agencies.
  • Establish and maintain effective working relationships with those contacted in the course of work.
  • Work irregular or prolonged hours, including nights, weekends, holidays, shift work and/or after hours.


Length of Probation:
All permanent appointments to this classification shall serve a probationary period of twelve (12) calendar months or two thousand eighty (2,080) hours, whichever is more.

Bargaining Unit:
Safety Management - Placer County Law Enforcement Management Association

CLASS: 13833; EST: 9/1/1997; REV: 3/14/2022;