A private investigator completes an assignment for a client. According to the PSISA Code of Conduct, what is their obligation regarding the information gathered during the investigation?

1. To share the information with other investigators to build a collective database.
2. To destroy all records immediately after submitting the report to the client.
3. To keep all client and investigation information confidential, unless legally required to disclose it.
4. To disclose relevant findings to anyone who asks, to promote transparency.