Private investigators, environmental consultants and homeland security experts.

Providing investigators for attorneys, insurance companies and businesses as well as legal photocopy services.

Specializing in infidelity cases, Los Angeles.

Providing workers' compensation defense investigations to California business community.

Bay Area Investigations.

Female owned business, La Verne.

Los Angeles Private Investigators Agency.

Private investigators with offices in Asia and the United States.

Former INS employee handling wrongful convictions in the Los Angeles area.

Providing consulting and investigative services to the business and legal communities

Background and surveillance specialists, San Francisco.

Conducting fraud, elder abuse, AOE/COE investigations. San Francisco Bay Area.

Full service agency located in Riverside County.

Offers litigation support, judgment recovery, skip tracing, and paralegal services in Placentia.

This is the largest private investigation association in the State of California

All California investigation companies can be verified through the BSIS

Woodland Hills, specializing in locating individuals, background and fraud investigations.

Specializing in personal security and backgrounds, located in Manhattan Beach.

San Diego investigative and security consultant services.

Provides asset assessments, people location, and litigation preparation in San Bruno.

Specialized site to assist you with the defense of your legal case.

Los Angeles area investigative firm.

Full service private investigations company in Central California.

Provides infidelity investigations.

Located in Redwood City, specializing in domestic investigations, records research, backgrounds, adoptee locates.

San Gabriel, specializing in felony criminal defense investigations.

Providing services to companies, attorneys, insurance industry, investigators, and the general public.

Sacramento based company firm specializes in insurance, healthcare fraud.

Investigative firm covering the entire state, serving individuals, corporations, and government.

Los Angeles agency, with coverage throughout Latin America

Extensive international and domestic investigative experience.

Multi talented agency in the San Francisco Bay area.

Man & Dog Teams, Explosives or Drug Detection

Bakersfield investigative firm

Oakland agency owned by former California State Police officer.

An international risk management firm.

Perform investigations of elder abuse, fraud and child abuse.

A San Francisco firm.

Full service agency in the San Francisco Bay area.

Specialists in investigative services with offices in Los Angeles, Signal Hill and Irvine.

A full service agency serving attorneys, corporations, and insurance.

Public and private sector investigations.

Workers' comp liability specialists, Salinas,

Specializes in digital surveillance for the insurance industry and private clients.

full service private investigative agency located in Auburn.

Personal and commercial investigation and adjusting services in Northern California.

Providing litigation support, claims investigation, and investigative research in the Bay Area.

Employment background screening services.

Full service private investigations firm with worldwide experience covering the state.

Specializing in personnel related investigations, pre-employment background investigations.

Full service firm based in Anaheim providing service to business, insurance and the legal community.

Services for attorneys, businesses and individuals, nationwide.

An experienced, professional, and efficient agency serving all of California.

Specializing in background checks, surveillance, missing persons, San Francisco.

provides litigation support services to the California legal community.

Specializing in civil rights, hostile workplace, process service, background and asset investigations. Based in Palm Desert, California.

Full service agency located in Los Angeles and Temecula.

Specializing in locating persons, assets, backgrounds and fraud investigations.

Fresno area retired city police detective.

Polygraph testing and private investigation services.

San Francisco Bay Area providing a full range of investigative services.

Professional confidential investigations with judgment recovery and enforcement.

Serving business, attorneys and executives, Escondido.

Workplace violence and background checks, Lodi.

Orange County based investigative firm.

Provides full service investigations in the Santa Barbara area.

Investigative agency with offices in Beverly Hills.

Specializing in video and photographic surveillance operations, Los Angeles.

Fresno and Central Valley, specializing in AOE/COE, Backgrounds, and Internal Affairs.

El Segundo, security and background information specialist.

LSIS is a full service investigative agency.

Private investigative & security agency based in San Francisco.

Anaheim firm with emphasis on commercial, criminal and industrial fraud.

A full-service agency composed of former federal agents, located in Anaheim.

Pre-employment screening, Carmichael.

Serving the Central Coast, Santa Barbara & Ventura counties.

Offering asset investigations to surveillance to computer forensics.

San Diego County, serving individuals, corporations, insurance and Attorneys.

Private investigator specializing in locating missing persons, background checks and surveillance.

21 years police experience in a variety of specialized areas.

Specializes in surveillance & activity checks, Irvine.

Nationwide corporate, surveillance, and executive protection services.

Full service agency located in Sacramento with statewide resources.

Service representing individuals and businesses, Redding.

Private investigations and computer forensics in southern California.

A full service investigative firm.

Specializes in homicide involving firearms, Ventura.

Domestic, premarital and surveillance, Petaluma.

Provides insurance investigations throughout California.

Software piracy and compliance investigations and programs.

Provides corporate security, investigations, competative intelligence, pre-paid Legal Services

Consulting and investigative services, specializing in counter-terrorism and explosives.

Litigation support for civil and criminal cases in Laguna Hills.

A latino bi-lingual agency located in Fremont.

Specializing in background, fraud and missing person investigations.

Offering investigation services for the insurance industry in San Diego.

Specializing in Missing Persons, Background, Workplace/Domestic Violence, and Sexual Harassment.

San Diego and Orange County focus.

Specializes in forensic and aerial photography, San Jose.

Full service agency serving Northern Central California.

Southern California, including accident investigation, surveillance, locating people, and background checks.

PI, research and locator service.

A full service detective agency in Tarzana.

Investigations and claims management in San Francisco and Los Angeles.

Investigation and security services. Southern California and San Diego.

Provide support to the legal community, business or individual.

Provide a wide range of services for corporate clients, the legal profession and the general public.

Investigative & security services in San Diego.

Ontario based private investigations company.

Specializing in surveillance and investigator training.

Full service agency, services range from surveillance and backgrounds, to finding missing persons.

An investigation and security firm based in Fullerton.

Located in Camarillo, specializing in backgrounds, computer forensics, due diligence and environmental liability.

Surveillance, missing persons, locates, international locates.

Culver City based full service investigative agency.

A full service firm located in Santa Rosa.

Specializes in Surveillance, AOE/COE, Subpoenas, Background & Domestic, San Diego.

A full service investigative and security company in Northen California

Palm Springs, serving all of Southern California.

Full service, agency, providing services to attorneys, corporations, insurance and the public.

A full-service investigative company.