Since 1988, John A. Demarr, P.I., has been providing professional, licensed private investigation and private detective services, to businesses and individuals in California and beyond. Our clients include law firms, insurance companies, major corporations and small businesses.
We also provide services to private individuals. Our California-based private investigators and private detectives provide experienced, discrete marital infidelity investigation; spouse and nanny surveillance, and child custody monitoring. Our investigators have testified in court many times – and you should consider the value of an objective investigator’s court testimony presented to a judge and/or jury.
Our staff includes police-trained, seasoned professional investigators, document experts, interview experts, and industry experts in the credit, collections, lending, and legal fields. We are trained to deal with private investigation, process service, site security (commercial and residential) and all phases of private detective work.