Private investigators are hired for their greater skills, resources, and time. They often have accessibility to data banks including background records, motor vehicle records, and business records. The best time for attorneys to hire private investigators is before filing suit. However, the client must often be careful to warn the private investigator against using legally questionable tactics and to adhere to privacy law restrictions. The person who hires an investigator can be held liable in civil and criminal courts for violations of law carried out on their behalf. Private investigators must also be aware of moral and ethical constraints involving slander and invasion of privacy. When selecting a private investigator, one should use reliable references and retain only the investigator recommending himself to you or check out the employee assigned to the case. Be sure the investigator is licenses and bonded, insured, educated and trained, aware of legal and ethical issues, and signs a contract.