How To Find And Hire A Private Investigator

How can I find and hire a private investigator?

Almost every state at least has a license investigator association. You can go in California and contact a group called CALI; California Association of Licensed Investigators. They have a directory that you can even look through online and it will give you specific categories. If you need a polygrapher, somebody that specializes in surveillance, somebody who specializes in domestic cases, forensic cases or computer crimes; any particular field that you're looking for as a private investigator can be found in the state association for that particular state.