Evidence Technician III (#RP4013)
$33.01-$40.13 Hourly / $5,721.90-$6,955.00 Monthly / $68,662.83-$83,460.09 Yearly


Under general direction, performs supervisory work of a unit of Evidence Technicians and Evidence Custodians performing complex technical work in connection with law enforcement investigative processes; and does related or other work as required in accordance with Rule 3, Section 3 of the Civil Service Rules.


This is the supervisory level class in the Evidence Technician series. An employee in this class is responsible for the supervision of a unit of Evidence Technicians and Evidence Custodians in the Sheriff's Department. An employee in this class is also responsible for the most complex and difficult evidence technician work of the unit.


  • Trains and evaluates the work of a unit of Evidence Technicians and Evidence Custodians; schedules and assigns technicians to various schedules; advises staff of complex problems. 
  • Develops, reviews and insures that all evidence collection, storage methods and procedures are followed completely and accurately. 
  • Classifies, indexes, and files fingerprints; searches files and compares indexed fingerprints against latent, plastic, visible or photographic impressions obtained at the scene of crimes; prepares fingerprint examples for court as required. 
  • Operates cameras and photographic processing equipment used in the exposures and development of photographic film and papers. 
  • Photographs perishable and other evidence, personal injuries and persons for identification purposes. 
  • Assists in preparing evidence for court; may testify in court. 
  • Prepares requests for materials, supplies and equipment for annual budget. 
  • Maintains records and prepares reports.


Licenses and Certificates: Possession of a valid California Driver’s License.

Experience: Three years experience equivalent to Evidence Technician II in San Joaquin County.

Experiences: Five years experience responsible for crime scene response in a law enforcement agency, which included one-year of supervisory experience.


Principles and practices of supervision; fingerprint classification, searching and filing methods; latent comparison and identification, interpretation, and preservation of evidence; photographic processes including developing and printing; record keeping and filing methods.


Plan, assign and supervise the work of others; develop and apply policies and procedures; acquire knowledge of modern methods, practices, and techniques of police work involving criminal investigation; operate photographic and darkroom equipment; lift latent fingerprints and classify fingerprints accurately; communicate effectively, both orally and in writing; read and understand directions, regulations, and technical matters; establish and maintain effective working relationships; testify in court as an expert witness; maintain detailed criminal records and prepare reports; take photographs with an assortment of camera equipment and under a variety of conditions to achieve a special or desired result; use computers skillfully and effectively; evaluate latent and inked prints as to suitability for processing through the Cal-ID computer system; utilize a Computer Aided Drifting and Design (CAD) program to create crime scene drawings.


San Joaquin County complies with the Americans with Disabilities Act (ADA) and, upon request, will consider reasonable accommodations to enable individuals with disabilities to perform essential job functions.

CLASS: RP4013; EST: 8/14/1991;