Evidence Technician II (#RP4012)
$28.52-$34.66 Hourly / $4,942.81-$6,008.02 Monthly / $59,313.81-$72,096.30 Yearly


Under general direction, performs 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 journey level class in the Evidence Technician series. An employee in this class provides technical services related to the investigation and prosecution of criminal cases following well-defined methods and procedures.


  • 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. 
  • Evaluates latent prints as to suitability for processing in the A.F.I.S. (Automated Fingerprint Identification System) system and ensure optimum performance of that system. 
  • Photographs, traces, and processes identifiable latent prints through the A.F.I.S. system. 
  • Evaluates the results from A.F.I.S. and makes necessary comparisons to form a conclusion. 
  • Obtains information from individuals regarding personal histories and criminal records. 
  • May receive, tag, and store evidence, found property, or property maintained for safekeeping in the property room. 
  • Assists in preparing evidence for court; may testify in court. 
  • Maintains records and prepares reports. 
  • Learns to create crime sketches on paper and with computer-aided drafting and design programs.


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

Experience: One-year experience equivalent to Evidence Technician I in San Joaquin County. 

Experiences: Two years experience responsible for crime scene response in a law enforcement agency.


Fingerprint classification, searching and filing methods; latent comparison and identification techniques; methods of identification, interpretation, and preservation of evidence; photographic processes including developing and printing; record keeping and filing methods.


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 to 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 Drafting 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: RP4012; EST: 8/14/1991;